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Mathematics Questions and Answers May 30, 2023

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Please use the following link to view the journal article in order to answer the following question: Article: https://akjournals.com/view/journals/2006/4/2/article-p85.xml Question: Check all of the following research designs and methods that are applicable to this study: O Quantitative O Qualitative Experimental Non-Experimental O Case Study
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. A survey was recently conducted in which males and females were asked whether they owned a laptop personal computer. The following data were observed (5 points): ---- Have a. What are the null and alternative hypothesis if you want to test if the two variable are independent? 3. What is the critical value for testing whether the two variables
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What is the commercial stating about its effectiveness? The commercial is stating that this pill can alleviate some aches and pains you may have at night and help you get better sleep. The commercial shows the couple tossing and turning and unable to rest properly, the commercial shows that this pill can give you some relief. At the bottom in

The name or category "cancer' represent what kind of variable? a- nominal b-ordinal c-interval d-ratio

Homework 2 (Exercise 1.18 from Barber's book): Sally is new to the area and listens to some friends discussing about another female friend. Sally knows that they are talking about either Alice or Bella but doesn't know which. From previous conversations Sally knows some independent pieces of information: She's 90% sure that Alice has a white car,

Please help me solve this. Here is the complete question below Question 10 1 pts You are curious about the mean words per page contained in your Math textbook. Instead of counting the words on a subset of pages, you decide to count the number of words on every page in the textbook. You find the mean number of words per page to be 4,246. Which of
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When a researcher reports that a result is statistically significant, what does this mean? Group of answer choices The result is important and clinically meaningful The result does not contain a Type I or II error The obtained result likely was not the result of chance The result did not fall within the critical region on the sampling distribution

If you decided to make the critical p-value or alpha for significance as 0.001 as opposed to the conventional 0.05, what would the consequences be? Group of answer choices You would be less likely to make a Type I error All of the answers There would be fewer instances when the null hypothesis would be rejected You would be more likely to make a

The national average of pollutants in waterways is 83 ppm with a standard deviation of 20.75. A researcher surveyed 78 waterways near industrial parks to see if this is greater than the population mean. The alternative hypothesis is HA: > 83. The researcher found the sample mean to be 149.29 with a p-value of 0.0007. Using a significance level of

The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 23 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 23 golfers play a round of golf on his friend's course and records their scores again. The average difference in

At a major credit card bank, the percentages of people who historically apply for the Silver, Gold and Platinum cards are 60%, 30% and 10% respectively. In a recent sample of customers responding to a promotion, of 200 customers, 112 applied for Silver, 56 for Gold and 32 for Platinum. Is there evidence to suggest that the percentages for this

You wish to test the following claim (H1) at a significance level of a = 0.08. Ho : p1 = P2 H1 : pl > p2 The 1st population's sample has 241 successes and a sample size = 388. The 2nd population's sample has 266 successes and a sample size = 443. What is the sample proportion for the 1st population? (Round to 2 decimals. ) What is the sample
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Please use the following link to view the journal article in order to answer the following question: https://doi.org/10.1556/2006.4.2015.010 (PLEASE MAKE SURE YOU VIEWING THE CORRECT ARTICLE BEFORE ANSWERING CALLED: Relationship of smartphone use severity with sleep quality, depression, and anxiety in university students BY KAD?R DEM?RC?*, MEHMET
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Fill in the missing words to complete the following statement: " _____________ is a measure of data central location, ______________ is a measure of data variability, and _______________ is a measure of an observation's relative standing

An article in Fire Technology investigated two different foam-expanding agents that can be used in the nozzles of firefighting spray equipment. A random sample of five observations with an aqueous film-forming foam (AFFF) had a standard deviation of 0.6. A random sample of five observations with alcohol-type concentrates (ATC) had a standard

What does L-data stand for in Cattell"s work? Group of answer choices Lie-data (information that the person may have lied during the assessment Life-record data (information from a person's life history Large-data (information from data mining) Lesson-data (information from how well a person learned new lessons)

Hello, I am not sure if I formed a 1-tailed null hypothesis and 1-tailed alternative hypothesis correctly. Example: Patrick is interested in finding data on the correlation between student loan debt and stress among graduate students. After conducting some research, he discovered that the average amount of graduate student loan debt per student in

Infections sometimes occur when blood transfusions are given during surgical operations. An experiment was conducted to determine whether the injection of antibodies reduced the probability of infection, by examining the records of141patients.Do the data provide sufficient evidence to indicate that injections of antibodies affect the likelihood of

Watch Video Show Examples Lydia has a bag that contains orange chews, cherry chews, and peach chews. She performs an experiment. Lydia randomly removes a chew from the bag, records the result, and returns the chew to the bag. Lydia performs the experiment 62 times. The results are shown below: A orange chew was selected 25 times. A cherry chew was

Given Y 1 , . . . , Y n are iid random variables and f ( y ; ) = 1 e x p ( y ) And < y < , 0 < < i) With known, solve for a method of moments estimator of ii) With known, solve for a method of moments estimator of

The Honolulu Advertiser states that in Honolulu there was an average of860burglaries per 100,000 households in a given year. In the Kohola Drive neighborhood there are324homes. Let r = number of these homes that will be burglarized in a year. (a) Explain why the Poisson approximation to the binomial would be a good choice for the random variable r

a researcher wants to conduct a study to determine rhe number of dogs who can run obstacle courses. they want to find the 80% confidence interval for population proportion, which gives z scores 1.2816. they want margin of error no more than 15 percentage points: what is minimum sample size

The datasetEducation - Post 12th Standard.csvcontains information on various colleges. perform Principal Component Analysis for this case study according to the instructions given. The data dictionary of the 'Education - Post 12th Standard.csv' can be found in the following file:Data Dictionary.xlsx.

QUESTION SIX (a)Suppose that a decision is faced with three decision alternatives and four states of nature. The following profit payoff table is constructed: Alternatives State of Nature S 1 S 2 S 3 S 4 1 18 12 15 8 2 15 14 10 11 3 13 16 19 15 Assuming that the decision maker has no knowledge about the probabilities of occurrence of the four

3. For each of the following state the appropriate test (specify the hypothesis test or correlation) and justify why you selected that test. NOTE: this means ANY hypothesis test or correlation covered this semester. a. A psychologist administers a small, medium, or large dose of a drug to a sample of mice and measures reward seeking behavior
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When conducting serial or sequential screening tests in a row, rather than a single test at one time, what is the impact on sensitivity and specificity. Group of answer choices There is a loss in net sensitivity and a gain in net specificity There is a gain in net sensitivity and a gain in net specificity There is a gain in net sensitivity and a

GIVE TWO EXAMPLES OF SIMPLE RANDOM SAMPLING, SYSTEMATIC SAMPLING, STRATIFIED SAMPLING, CLUSTER SAMPLIG AND MATCHED RANDOM SAMPLING.

The probability is ? Assume that when adults with smartphones are randomly selected, 56% use them in meetings or classes. If 6 adult smartphone users are randomly selected, find the probability that at least 3 of them use their smartphones in meetings or classes. The probability is (Round to four decimal places as needed.)
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Question: What are the MAD, MSE and MAPE scores for the three-period weighted moving average forecast? Round any intermediate calculations, if necessary, to no less than six decimal places, and round your final answer to one decimal place. The numbers to be used are in the attached screen shot. \f
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In the Sobczynzka-Malefora et al. article, the researchers measured serum fasting glucose values. What type of measurement is this? (Hint: refer to Table 1 for the results on serum fasting glucose) Group of answer choices c. Ordinal a. Ratio b. Interval d. Nominal

Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at an archaeological site. At one excavation, a sample of 181 potsherds indicated that 62 were of the three-circle, red-on-white pattern. a point estimate p for the proportion of all ceramic potsherds at this site that are of the

Why is it that one of the one-sided alternatives is not statistically significant (p = 1)? Question 1 options: Because it's running a different type of test Because the function is asking if x is greater than y, when the mean of x is smaller than y Because the function is asking if x is equal to y, when they are not Because the function is asking

Which of the following results in the null hypothesis u =15 and alternative hypothesis u > 15? Select the correct answer below: An airline claims that the mean amount of time that a late flight is delayed is more than 15 minutes. An airline claims that the mean amount of time that a late flight is delayed is fewer than 15 minutes. An airline

The breaking strengths of cables produced by a certain manufacturer have a mean, u, of 1850 pounds, and a standard deviation of 75 pounds. It is claimed that an Improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 70 newly manufactured cables are randomly chosen and tested, and their mean
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One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. After taking the test and seeing your score for this subsection, you're interested in the mean score, j, among the general population on this subsection. The website reports that u is 145, but you believe that u is less than
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Born in 1980 Born in 1960 Please re-work this last problem using excel. (You should get same results) X1 CO XZ Please note: that the lecture notes also provide examples of how to complete these tests. 8.5 For this problem please hand in both your excel printouts and your graph "Are women's feet getting bigger? Retailers in the last 20 years have
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What is Partitional Clustering? What is Spectral Clustering?

Fill in the blank question. Another decision in this area is whether the instrument is designed to submit the participant's response after BLANK questions when the participant clicks for the next question or only at the end of the BLANK

Survey research tends to use which of the following? Question 57 options: nonrepresentative sampling convenience sampling nonprobability sampling probability sampling

Consider 10.1.2 Homework Problem 9.Which of the predictions, ^(31),^(39),^(61) would you expect to be closest to the true number of bladder deaths for the corresponding level of cigarette consumption? Note: this is function notation. ^() is the estimated value of b when the predictor variable (c in this case) is equal to/has a value of "blah."

Sampling Distributions: The scores of individual students on the American College Testing (ACT) Program composite college entrance examination have an approximately Normal distribution with a mean score of 18.4 and standard deviation 5.6. At a local high school, 145 seniors take the test. Assume that the scores at this school have the same

Drawing Tools Convert Insert Replay b. If you randomly sample 40 Minnesota adults, what is the probability your sample mean is less than 40 hours? 2 of 4 367 words Focus 08 11:07 PM O Type here to search N W 3/20/2021
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Dashboa rd Courses Calendar Q lnbox C9 History Q Studio Help Fall 2023 Home Announcements | Assignments Discussions Grades @ People Files SyHabus Quizzes Modules BigBlueButton Collaborations Google Drive Badges Folio Dropbox for Canvas Support Resources Zoom Web Link Assignments w Due Tuesday by 11:59pm Points 10 Submitting a le upload mgnment 5
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By using a distribution that includes a _______, you explicitly recognize the possibility that things can turn out poorly. Group of answer choices best-car scenario constant variable worse-case scenario random variable

64 64% of U.S. adults have very little confidence in newspapers. You randomly select 10 U.S. adults. Find the probability that the number of U.S. adults who have very little confidence in newspapers is (a) exactly five, (b) at least six, and (c) less than four.

Consider a randomized trial of some treatment T on some outcome Y, and an additional observed two-level variable Z. If (i) the risk difference for the effect of T on Y is non-null, and (ii) the risk difference for the effect of T on Y is the same when Z=0 and Z=1, then what do you know about the risk ratio for the effect of T on Y? (choose one) a.

Which of the following is the best strategy for checking for independence in a data set? Group of answer choices Graph the data and look for relationships in the residuals Check whether the data was collected on or near the 4th of July. Watch out for issues in the experimental design that might indicate nonindependence of the data. Check the

A study found that the more elementary and junior high students are involved in structured after-school activities, the less likely they are to get involved with drugs. Which of the following correlations would reflect this relationship

Use the following situation for Questions 48 ?V 50. A research firm reported that 15% of those surveyed described their health as poor, 26% as good, 40% as very good, and 19% as excellent. A health professional in Chicago wanted to determine if people in Chicago had similar feelings toward their health. In a sample of 600 people in Chicago, 70
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the distribution of a passenger vehicle speeds travelling on the interstate 5 freeway (I-5) in California is nearly normal with a mean of 72.6 miles/hour and a standard deviation of 4.78 miles/hour. how fast do the fastest 5% of passenger vehicles travel?

What would be the best way to effectively present the data findings below using a table for clarity and ease of comparison? To effectively present your data findings, consider using a table for clarity and ease of comparison. Below, there's a simplified table structure: +----------------------------------+---------------------------------+ |

A pharmaceutical company proposed a vaccine that would combat paralytic polio. Two independent random samples were collected from the population. One random sample of 201,229 was given the placebo, and among them 100,910 contracted paralytic polio. The other random sample of 200,745 was given the vaccine, and among them 50,033 people ended up

If a hypothesis test is carried out using 5% level of significance against a specific alternative with a power of 90% and the null hypothesis is rejected, what is the probability that it is actually true?

about 46% of american can wiggle their ears. a researcher suspects that this is different percentage for nursing students. what can be concluded at a=0.14 level of signifance? state hypothesis test ho:p=. And ha:p

You are an epidemiologist investigating increasing cancer rates reported in Southern California. You choose to utilize a case-control study and subsequently identify 2,000 people living in and around the town of Jericho. Three years ago, 1,000 employees of Jericho Gas & Electric were accidentally exposed to high levels of Hexavalent Chromium VI

Which of the following is the correct way to report the results of a dependent sample t test? Group of answer choices The t test was significantly different between group one and group two On average, the sample glucose level after the new diet (M=132.7, SE = 0.43) was significantly lower than that before the new diet (M= 155.7, SE = 0.46), t (35)

According to the National Association of Colleges and Employers, finance graduates make an average of () $52,402 a year. The standard deviation of annual salaries of finance graduates is () $7,000. A random sample of 100 accounting graduates show that the sample mean salary is $54,390. If we were to increase the sample size (n) from 100 to 144,

Hello, I am getting an error saying that my Part C is incorrect, can someone help? Assume a population of 4, 5, and 9. Assume that samples of size n = 2 are randomly selected with replacement from the population. Listed below are the nine different samples. Complete parts a through d below. 4,4 4,5 4,9 5,4 5,5 5,9 9,4 9,5 9,9 Er (Round 10 three
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for each scenario, tell me the type of test (one-sample z-test, one-sample t-test, independent samples t-test, paired t-test, confidence interval, one-way ANOVA, two-way ANOVA, or repeated measures ANOVA) and tell me why you think it is that particular test. Fred always has theories about his students and who is more likely to pass his tests. He

What does a reported confidence interval (CI) of 95% indicate? Select one: a. Mean score for distribution b. There is a significant difference in scores c. There is no difference in scores d. If repeated the true mean would be within this range 95% of the time

Approximately 10% of all people are left-handed.Consider a grouping of fifteen people. how do i write the probability distribution. How do I draw a histogram for this? HOW DO IFind the mean. HOW DO I Find the variance. HOW DO I Find the standard deviation.

for each scenario, tell me the type of test (one-sample z-test, one-sample t-test, independent samples t-test, paired t-test, confidence interval, one-way ANOVA, two-way ANOVA, or repeated measures ANOVA) and tell me why you think it is that particular test. Professor Jennings has often wondered how well incoming freshman at his college performed

please help Do people walk faster in the airport when they are departing (getting on a plane) or do they walk faster when they are arriving (getting off a plane)? A reputable researcher measured the walking speed of random travelers in two International Airports. His findings are summarized in the table. Complete parts (a)-(c) below. Click the
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Find the monthly payments on a 3-year lease for a $29,030 car if the car's residual value is $15,859 and the lease has an annual interest rate of 3.9%. Round your answer to the nearest dollar.

Need help finding F and P value from the data. Thanks. An insurance company is trying to determine if there is a signicant difference in the mean approval based on education level, The accompanying approval data comes trom a sample of customer, Additionally, you will nd a partially completed ANOVA table, complete the table, use it to address the
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A past survey of 1,068,000 students taking a standardized test revealed that 8.4% of the students were planning on studying engineering in college. In a recent survey of 1,476,000 students taking theSAT, 9.2% of the students were planning to study engineering. Construct a 90% confidence interval for the difference between proportions p1p2 by using

Find the monthly payments on a 3-year lease for a $28,577 car if the car depreciates at an annual rate of 13% and the lease has an annual interest rate of 4.6%. Round your answer to the nearest dollar.

An article describes a survey of 2,096 American adults. Survey participants were asked if they were football fans and also if they agreed or disagreed that the rules that the National Football League adopted in 2010 designed to limit head injuries have been effective. Data from the survey are summarized in the table below. Agree Disagree Total

1. A bank has kept records of the checking balances of its 4000 customers and determined that the average daily balance of its customers is $300 with a standard deviation of $48. A random sample of 144 checking accounts is selected. Please answer the following questions. (a) What is the probability that the sample mean will be more than $309? (b)

A randomly selected sample of collegefootballplayers has the following heights in inches. 67, 70, 62, 69, 70, 65, 66, 65, 65, 63, 66, 71, 62, 61, 61, 71, 63, 70, 63, 66, 64, 69, 71, 64, 64, 64, 69, 64, 71, 64, 69, 66 Computea90% confidence interval for the population mean height of college footballplayers based on this sample and fill in the

(a) Using the regression results in column (1), is the college-high school earnings difference estimated from this regression statistically significant at the 5% level? Use an appropriate statistical test to explain your answer. Show your work. (b) Using the regression results in column (1), is the male-female earnings difference estimated from
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The four steps are identify, check, calculate, and conclude. Burger 'N Bounce, a local fast-food restaurant with an indoor playground, makes a significant amount of profit off the sales of soft-drinks. The owner has been training the employees at the registers to ask customers whether they would like to purchase a drink. The owner has come up with
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1. Bayes' theorem tells us how to obtain new probabilities from those that were altered by obtaining additional information. True or False 2.Bayes' theorem can be used to compute the posterior probabilities of the complement of an event, because the event is collectively exclusive. True or False

Required information [The following information applies to the questions displayed below.] Keywords: Apply the same steps in Lab 8.4 to the Alt Lab 8.4 Data.xIsx dataset. Thrustmaster is a fictitious company that sells game controllers; joysticks; steering wheels for PCs; and XBOX, Nintendo, and PlayStation consoles. It sells most of its products
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Use the cashier's algorithm to make change using quarters, dimes, nickels, and pennies for a) 51 cents. b) 69 cents. c) 76 cents. d) 60 cents

A group of 59 randomly selected students have a mean score of 29.5 with a standard deviationof 5.2 on a placement test. What is the 90% confidence intervalfor the mean score,, of allstudents taking the test? 27.8 < < 31.2 27.9 < < 31.1 28.4 < < 30.6 28.2 < < 30.8

We are conducting a test of the hypotheses H0: p = 0.28 Ha: p 0.28 We find a test statistic of z = -1.45.What is the corresponding p-value? Give your answer as a proportion between 0 and 1 to 4 decimal places.

Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an introductory psychology course. The "need for closure scale" has scores ranging from 101 to 201. For the 69 students in the highest

Suppose a person's birthdate is Jun 1. The person's zodiacal constellation in which the sun is "located" on that date is

10.H0: 16.06 vs. HA: > 16.06 What is the test statistic for sample of size 25, mean 14.26, and standard deviation 1.80? Enter the test statistic with 2 decimal place __________

Rara works for the Bureau of elites. The number of froms processed by employees normally distributed with a mean of 66 forms per employee a dayand a standard deviation of 6. Rara's manager calculates that since Rara' s average rate is 40 forms per day. What percentage of employees process fewer forms than Rara? What percentage of employees process

Do the Critical Period Hypothesis and Krashen's Input hypothesis completely support each

The time between arrivals of customers at the drive-up window of a bank follows an exponential distribution with a mean of 10 minutes. a)What is the probability that the arrival time between customers will be 7 minutes or less? b)What is the probability that the arrival time between customers will be between 3 and 7 minutes? c)What is the

You are building binary classifiers to predict rare but highly consequential events (e.g., malignant tumors where, positive outcome class=malignant ,negative outcome class=benign ). Given the following options which classifier would you choose? Group of answer choices High overall Accuracy High True Negative Rate High Recall, Low Precision (for

a researcher conducted a study with 23 children and found 98% confidence interval for the age thT they learn how to walk to be (8.86, 11.3) months what does this confidence interval tell you? Select best answer. We estimate that 98% of children learn to walk between 8.86 and 11.3 months

1.Fourballs are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability of the given event. (Round your answer to three decimal places.) Two or three of the balls are white. 2.A customer from Cavallaro's Fruit Stand picks a sample of4oranges at random from a crate

for each scenario, tell me the type of test (one-sample z-test, one-sample t-test, independent samples t-test, paired t-test, confidence interval, one-way ANOVA, two-way ANOVA, or repeated measures ANOVA) and tell me why you think it is that particular test. Janet really thinks the type of pancakes she serves her 22 children makes a difference on

Please solve both parts a and b of the question below. Read https://www.sciencedirect.com/science/article/pii/S0749379715002524 a.) What seems to be the strongest predictor of strongly or somewhat favoring raising the minimum age of sale to 21 years? b.) How do you interpret the coefficient?

Statistics HAVING A SURGICAL OPERATION (SVY 1) N Valid 270 Missing Mean 3.06 Median 3.00 Mode 3 Std. Deviation 1.886 Minimum O Maximum 6HAVING A SURGICAL OPERATION (SVY 1) Cumulative Frequency Percent Valid Percent Percent Valid NONE 36 13.1 13.3 13.3 VERY LITTLE 32 11.6 11.9 25.2 LITTLE 26 9.5 9.6 34.8 SOME 65 23.6 24.1 58.9 MUCH 38 13.8 14.1
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Assume that when adults with smartphones are randomly selected, 42% use them in meetings or classes. If 5 adult smartphone users are randomly selected, find the probability that exactly 3 of them use their smartphones in meetings or classes The probability is (Round to four decimal places as needed.)
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Beer and Diapers: There is a popular story (among data miners) that there is a correlation between men buying diapers and buying beer while shopping. A student tests this theory by surveying140male shoppers as they left a grocery store. The results are summarized in the contingency table below. Observed Frequencies: O i 's Bought Did Not Diapers
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22.jpg E ... Oaty is a company that manufactures and sells boxes of breakfast oats, with fifteen different varieties. a) Oaty has hired a new accountant. As they are new, the accountant wants to understand Oaty's past performance. They decide to take a sample of past monthly sales ($000), corresponding supermarket stockists, types of flavours sold
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Find/discover an example of statistics & probability in the news to discuss the following statement that represents one of the objectives of statistics analysis: "Statistics and Probability helps us make decisions based on data analysis." Briefly discuss how the news item or article meets this objective. Cite your references. Also, keep in mind

The director of a firm at Menem Museum recently collected data on donations for past several years. He found the data are normally distributed with a mean of $50 and a standard deviation of $12. The director's ideal point for a minimum donation of 60%. What percentage of individual donations are $60 or more? What percentage of individual donations

The Virginia Cooperative Extension reports that the mean weight of yearling Angus steers is 1152 pounds. Suppose that weights of all such animals can be described by a Normal model with a standard deviation of 84 pounds. Using this model, about what percent of steers weigh over 1225 pounds? Please round your answer to the nearest whole percent

The following table shows the distribution of employees in an organization. Martha Foreman, an analyst, wants to see if race has a bearing on the position a person holds with this company. \f
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The possible answers for each question are: sometimes, always, or never a true statement. Please explain your answers. (5 points) Consider each of the statements below. For each statement, decide whether it is sometimes, always, or never a true statement. ? sample. ? is computed. ? A V A V 1. In general, increasing the sample size in a statistical
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A researcher is interested in investigating the resting pulse rate of women who exercise regularly. She wants to perform a hypothesis test to determine whether the mean resting pulse rate of women who exercise regularly is less than 65 beats per minute.What type of hypothesis test would this be? not enough information is given left or lower tailed

need a solution to this question please 2. A product is ordered once each year, and the reorder point without safety stock (dL) is 100 units. Inventory carrying cost is $10 per unit per year, and the cost of a stockout is $50 per year. Given the following demand probabilities during the reorder period, how much safety stock should be carried?
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The crude death rate for Cherry Hill, NJ is 2 times higher than the crude death rate for Camden, NJ. However, the age-adjusted rate for Cherry Hill is equal to the age-adjusted rate for Camden. Given this information, and assuming that there is higher mortality among older age groups, which of the following can you conclude? Group of answer

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