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Mathematics Questions and Answers March 13, 2023

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Given =500, =15, and n=25, compute the standard error of the mean

Bar Graph of Highest Degree Frequency table of highest level of school or highest degree Highest level of school or highest degree Less than high school degree High school degree or equivalent (e.g., GED) Some college but no degree Associate degree Bachelor degree Graduate degree Total Frequency Percent 8 15.38% 3 5.77% 11 21.15% 9 17.31% 11

Microchip Contract A company receives an order for five custom made microchips at a price of $7,500 each. The company will produce the chips one by one using a complex process which has only a 67% chance of producing a defect-free chip at each trial. After five defective chips are produced the process will be stopped. A cost accountant at the

Most US adults have social ties with a large number of people, including friends, family, co-workers, and other acquaintances. It is nearly impossible for most people to reliably list all the people they know, but using a mathematical model, social analysts estimate that, on average, a US adult has social ties with 634people. 1 A survey of

Suppose x has a distribution with = 38 and = 9. (a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means? Yes, the x distribution is normal with mean x = 38 and x = 2.25.Yes, the x distribution is normal with mean x = 38 and x = 0.6.No, the sample size is too small.Yes, the x distribution is

The average salary of a travel management professional is $98,500. Assume that the standard deviation of such salaries is $40,000. A random sample of 100 travel management professionals are selected, then the mean and standard deviation of the sampling mean is __________.

Hey do you want to look at a paper another tutor did for me? He has this right tailed and left tailed example of hypothesis testing and no where in my stats book does it mention that. You did a very nice job on my assignment and I would pay you to take care of the discussion but I have to post it by this afternoon.

The term "queue discipline" refers to a.the willingness of customers to wait in line for service B. having multiple waiting lines without customers switching from line to line C. the order in which customers are processed D. the reason waiting occurs in under loaded systems

Probablitiy QNT/351 Version 5 University of Phoenix Material PROBABILITY Maximum and Minimum Temperatures Search the Internet for U.S. climate data. Choose the city in which you live. Click on the tab that reads \"Daily.\" 1. Prepare a spreadsheet with three columns: Date, High Temperature, and Low Temperature. List the past 60 days for which data

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1.Two boats, the Prada (Italy) and the Oracle (USA), are competing for a spot in the upcoming Americas Cup race. They race over a part of the course several times. The sample times in minutes for the Prada were: 12.9, 12.5, 11.0, 13.3, 11.2, 11.4, 11.6, 12.3, 14.2, and 11.3. The sample times in minutes for the Oracle were: 14.1, 14.1, 14.2, 17.4,

A computer password consists of any seven capital letters from the ordinary english alphabet. 1) how many different passwords are possible? 2) How many different passwords have no repeated letters

David took a test whose mean was 70% and standard deviation was 5%. The total points possible was 50. David's results were reported to be at the 95th percentile. What was David's actual exam score(not percent), rounded to the nearest whole number? Tanner took the same exam as David. His score was at the 10th percentile. What was his score (not

The local pharmacy prides itself on the accuracy of the number of pills it distributes in a 60 count prescription. A quality control rep. randomly selected a sample of 40 prescriptions requiring a 60 pills. Assume the sample came from a normally distributed population with a population standard deviation of 4.45. The rep. recounted the pills in

Value 400.0 708.0 661.0 570.0 463.0 485.0 494.0 565.0 487.0 500.0 498.0 633.0 579.0 449.0 672.0 657.0 519.0 Size 1206 2393 2382 2149 1451 1525 1589 1919 1413 1416 1530 2348 1890 1308 2294 2334 1590 Number of Bedrooms 2.0 4.0 4.0 4.0 3.0 3.0 3.0 4.0 3.0 4.0 3.0 5.0 3.0 3.0 5.0 5.0 2.0 487.0 640.0 640.0 465.0 509.0 498.0 585.0 1764 2151 2523 1413

Use the normal distribution of fish lengths for which the mean is11 inches and the standard deviation is 5 inches. Assume the variable x is normally distributed. What percent of the fish are longer than 1 2 inches? If 3 0 0 fish are randomly selected, about how many would you expect to be shorter than 6 inches? (a) Approximatelywhat % of fish are

b-1. Determine the correlation coefficient. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) X Y ( ) 2 ( ) 2 ( )( ) 9.0 8.1 1.192 0.007 1.420 0.099 7.0 6.0 -0.908 3.674 0.825 1.741 11.0 3.6 2.083 4.340 10.945 -6.892 12.0 4.0 3.083 9.507 8.458 -8.967 8.0 5.0 -0.917 -1.908 3.642 1.749 7.0 10.0 -1.917

Please assist with the following homework questions. Please also include the work. 10.3 Comparing Two Independent Population Proportions 99. A recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. Suppose that the survey of 100 local seniors and 100 national

The amount of money spent weekly on cleaning, maintenance, and repairs at a large restaurant was observed over a long period of time to be approximately normally distributed, with mean = $597 and standard deviation = $44. (a) If $646 is budgeted for next week, what is the probability that the actual costs will exceed the budgeted amount? (Round

A Wall Street Journal poll asked 2,150 adults int he United States a series of questions to find out their view on the U.S. economy. Determine what kind of variable the responses to the questions are. for categorical variables, also specify whether nominal or ordinal. the numerical variables also specify whether discrete or continuous and whether

Hello, I just needed help with these few statistics questions. I really appreciate the help! Thank You. 1. In 1993, researchers investigated the effect ofweed-killing herbicides on house pets. They examined 832 cats from homes where herbicides were usedregularly, diagnosing malignant lymphoma in 413 of them. Of the 149 cats from homes where no

Respond to the following to describe a scenario where a researcher might use a Goodness of Fit Test, a Test for Independence, or an Analysis of Variance to investigate a research question. Example Scenarios Provide an overview of the scenario and an explanation of why the selected statistical test is appropriate. Provide brief descriptions of the

#6 A pharmaceutical manufacturer has projected net profits for a new drug that is being released to the market over the next 5 years: Year 1 2 3 4 5 Net Profit $(300,000,000) $(145,000,000) $50,000,000 $125,000,000 $530,000,000 Use a spreadsheet to find the net present value of these cash flows for a discount rate of 3%

1. Write one basic research question that calls for the use of a complex ANOVA, ANCOVA, or MANOVA. 2. The paper should be from 990-1320 words of content Please include the following in the research proposal: 1. Introduction (1-2 paragraphs) Present the research question of interest. Explain how the chosen statistical test applies to this research

he U.S. Department of Transportation maintains statistics for involuntary denial of boarding. In JulySeptember 2013, the American Airlines rate of involuntarily denying boarding was 0.45 per 10,000 passengers. What is the probability that in the next 10,000 passengers, there will be a. no one involuntarily denied boarding? b. at least one person

1. A sample of size36 is taken from an infinite population whose mean and standard deviation are49 and 10, respectively. The probability that the sample mean is larger than52 equals: 2. A sample of80 retirees is drawn at random from a normal population whose mean age and standard deviation are 70 and8 years, respectively. Find the standard error

For this problem, you will use the confidence interval to make a decision and answer the question. A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 1000 hours. This average is maintained by periodically testing random samples of 16 light bulbs. A sample of 16 light bulbs is randomly selected and tested.

Q-Mart is interested in comparing customer who used its own charge card with those who use other types of credit cards. Q-Mart would like to know if customers who use the Q-Mart card spend more money per visit, on average, than customers who use some other type of credit card. They have collected information on a random sample of 38 charge

Do graphs make data easier to understand? Why or why not?

How can you best describe the difference between inductive and deductive?

This is fictitious data. This is fictitious data. Home 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Nbhd 2 2 2 2 2 1 3 3 2 2 2 2 1 1 3 3 2 1 2 3 2 1 1 1 2 1 3 2 1

A)Assume the random variable x is normally distributed with mean mu=80 and standard deviation sigma=4. Find the indicated probability. P(68

Develop an Xbar and Rbar charts and determine if they are in control. Sample A B C D 1 142 153 124 130 2 124 156 145 157 3 124 137 130 128 4 158 156 123 127 5 148 128 140 138 6 149 140 133 159 7 136 140 142 146 8 127 142 154 133 9 137 144 132 125 10 145 123 160 135 Determine the estimate for the : Determine the A2 factor Determine the UCL for X

The dean of a university estimates that the mean number of classroom hours per week for full-time faculty is 12.0. As a member of the student council, you want to test this claim. A random sample of the number of classroom hours for eight full-time faculty for one week is shown in the table below. At alpha=0.05,can you reject the dean's claim? .

A hospital in a developing nation is forced to manually put the flu shot vaccine into syringes. The recommended dosage for the flu shot is 0.5mL. The local health authorities define all syringes that have less than 0.45ml or more than 0.55mL as defective. In a sample of 100 syringes, the hospitals quality control officer finds the average dosage

ECO 578 Fall 2015 Page 1 of 14 Name: _______________________ ID: _______________________ Online Final Exam There are 4 parts: Part A: True/ False (1-20) Part B: Select the correct answer for the following questions (21-40) Part C: Work Problem (41-52) **All work in part C must be shown step by step** Two different ways to submit your answer sheet

Does a raw score less than the mean correspond to a positive or negative standard score? What about a raw score greater than the mean? Raw scores below and above the mean will have negative standard scores.Raw scores less than the mean will have negative standard scores; raw scores above the mean will have positive standard scores.Raw scores below

It is known that 75 % of Asian population are infected with Hepatitis B. A) In a random sample of 303 Asian patients, what's the probability that over 270 of them are infected with Hepatitis B? (Round p^, p^ and your answer to 4 decimal places.) B) In a random sample of 353 Asian patients, what's the probability that over 270 of them are infected

Center and spread measures (15 points) Analysts have collected data on the annual number of vacation days of individuals working in three different companies. Below is the number of day vacated in each company: Company 1: 27 22 29 21 19 33 16 20 24 27 28 19 Company 2: 12 12 15 9 20 18 17 14 14 2 17 19 Company 3: 18 4 22 15 18 19 22 12 12 Give a

Twenty samples of subgroup size 7 ( n = 7) were collected for a variable measurement. Determine the upper control limit (UCL) for an R-chart if the mean of the sample ranges equals 4.4. Factors for calculating control limits n A2 D3 D4 2 1.880 0 3.267 3 1.023 0 2.574 4 0.729 0 2.282 5 0.577 0 2.114 6 0.483 0 2.004 7 0.419 0 1.924

Which of the following is an improper form of the null and alternative hypotheses? Select one: a. H 0 : < 0 and H a : 0 b. H 0 : = 0 and H a : a c. H 0 : 0 and Ha: > 0 d. H 0 : 0 and H a : < 0

Office Enterprises (OE) produces a line of metal office file cabinets. The companys economist, having investigated a large number of past data, has established the following equation of demand for these cabinets: Q = 10,000 + 60B 100P + 50C where Q = Annual number of cabinets sold B = Index of nonresidential construction P = Average price per

Finding the Best Car Value When trying to decide what car to buy, real value is not necessarily determined by how much you spend on the initial purchase. Instead, cars that are reliable and dont cost much to own often represent the best values. But, no matter how reliable or inexpensive a car may cost to own, it must also perform well. To measure

Please help me provide a basic and simple response to this discussion post: Confidence Intervals Sampling error is the main reason that people do not trust or like the single point estimates for the things they need measured. However, if people were to use confidence intervals, this helps them accept the results more willingly. A confidence

The motion picture industry is a competitive business. More than 50 studios produce a total of 300 to 400 new motion pictures each year, and the financial success of each motion picture varies considerably. Gross sales for the opening weekend, the total gross sales, the number of theaters the movie was shown in, and the number of weeks the motion

A population consists of all the weights of all defensive tackles on a university's football team. They are Johnson, 204 pounds; Patrick, 215 pounds; Junior, 207 pounds; Kendron, 212 pounds; Nicko, 214 pounds; and Cochran, 208 pounds. What is the population standard deviation (in pounds)? About 4 About 16 About 100 About 40 A sample of the

What is the meaning of the termstatistical inference? Statistical inference refers to a/an---Select---conclusionobservationassumption about the value of a ---Select---sample statisticpopulation statisticpopulation parametersample parameter based on information from the corresponding ---Select---sample statisticpopulation statisticsample

Twenty years ago, a very famous psychologist specializing in marriage counseling authored a book detailing the way in which she believed spouses should communicate. She is now interested in the proportion of all couples who bought her book who stayed together. For a random sample of 300 couples who bought her book, she found that 240 of them

Chart the data below in several ways, enough so you can talk about which modeling tool you should use. Then propose which modeling tools you are going to use and, based on/supported by your charts, why you will u Using split data modeling conduct a regression with categorical variables to create a forecast model. Discuss the information in the

Suppose 90% of the area under the standard normal curve lies to the right of z. Is z positive or negative? positive negative

Cake Mix Data for Course Assignments Cake Mix Mix #1 Mix #2 Mix #3 Mix #4 Mix #5 Mix #6 Mix #7 Mix #8 Mix #9 Mix #10 Mix #11 Mix 12 Mix #13 Mix #14 Mix #15 Mix #16 Mix #17 Mix #18 Mix #19 Mix #20 Mix #21 Mix #22 Mix #23 Mix #24 Mix #25 Mix #26 Mix #27 Mix #28 Mix #29 Mix #30 Packaging* Calories 1 120 2 120 2 110 2 110 1 100 1 120 1 130 2 120 1 110

WhichofthefollowingisanappropriatemeasureofcentraltendencyforthevariableGender? Mean1.7 Median2 ModeFemale Range1 Alloftheabove 2. Which of the following is an appropriate measure of central tendency for the variable Years with the Club? Mean 2.67 25th percentile 1.5 75th percentile 3.5 Range 9.5 None of the above 3. Which of the following is an

The lifespans in hours of a brand of batteries is approximately bell-shaped with a mean of 72 hours and astandard deviation of 5 hours. Use the Empirical Rule to answer the questions below. Provide a well-labeledsketch to support your answers. [9]Sketch: a) What percentage of batteries are expected to last more than 77 hours? b ) Approximately

In a group of 40 people, 10 are healthy and every person the of the remaining 30 has either high blood pressure, a high level of cholesterol or both. If 15 have high blood pressure and 25 have high level of cholesterol, a) how many people have high blood pressure and a high level of cholesterol? If a person is selected randomly from this group,

Vice-president Arun Mittra speculates: We have always estimated how many transformers will be needed to meet demand. The usual method is to look at the sales figures of the last two to three months and also the sales figures of the last two years in the same month. Next make a guess as to how many transformers will be needed. Either we have too

MAT540 Homework Week 2 Page 1 of 4 MAT540 Week 2 Homework Chapter 12 1. A local real estate investor in Orlando is considering three alternative investments; a motel, a restaurant, or a theater. Profits from the motel or restaurant will be affected by the availability of gasoline and the number of tourists; profits from the theater will be

A hypothetical regression equation may be: headcirc (cm) = 8.31 + 0.45 (gestational age - weeks) + 4.71 (birthweight - kg) A) Predict the average head circumference a 30-week old birth weighing 1.1 kg (round to nearest whole number) : ........cm B) Predict the average head circumference a 27-week old birth weighing 0.8 kg (round to nearest whole

Consider a bowl with 6 red balls and 4 black balls. Consider an experiment where three (3) balls are to be selected from this bowl. Let Y represent the total number of red balls selected. If the three balls are selected without replacement, what is the probability distribution of Y? What are the mean and standard deviation of Y?

Paint 1 128 137 135 124 141 Paint 2 144 133 142 146 130 Paint 3 133 143 137 136 131 Paint 4 150 142 135 140 153

Question 7. A researcher randomly sampled 30 graduates of an MBA program and recorded data concerning their starting salaries. Of primary interest to the researcher was the effect of gender on starting salaries. Analysis of the mean salaries of the females and males in the sample is given below. Suppose the researcher was attempting to show

#15 If= 400 ands= 100 the probability of selecting at random a score less than or equal to 370 equals ____. 0.1179 0.6179 0.3821 0.8821 Help Please within 30 minutes! I'm being timed! #13 The probability of randomly selecting a face card (K, Q, or J) or a spade in one draw equals ____. 0.0192 0.0577 0.4808 0.4231 #14 The probability of drawing an

Open the data set that you corrected previously for DownloadFestival.sav. You will use the following variables: Day1, Day2, and Day3 (hygiene variable for all three days). Create a simple histogram for each variable. Choose to display the normal curve (under Element Properties) and title your charts. Copy these plots into your document. Does this

1 A clinical trial is run to investigate the effectiveness of an experimental drug in reducing preterm delivery to a drug considered standard care and to placebo. Pregnant women are enrolled and randomly assigned to receive either the experimental drug, the standard drug or placebo. Women are followed through delivery and classified as delivering

Note: For this problem, your answer should be rounded to two decimal places. In a particular municipality, it is believed that 25 percent of homes are not properly insulated. In order to test H 0 : p = .25 vs. H A : p . 25 (where p is the population proportion of homes that are not properly insulated) a random sample of 300 homes was selected. In

roblem 8-25 Air pollution control specialists in southern California monitor the amount of ozone, carbon dioxide, and nitrogen dioxide in the air on an hourly basis. The hourly time series data exhibit seasonality, with the levels of pollutants showing patterns that vary over the hours in the day. On July 15, 16, and 17, the following levels of

Whichofthefollowingisanadvantageofretrospectivecohortstudies? A. Inarelativelyshortperiodoftime,asignificantamountoffollow-updatamaybecollected B. Investigatorscancollectdataonexposures C. Thesizeofthecohorttoberecruitedisundercontrolbytheinvestigators D. Directmeasuresoftheenvironmentcanbemadeinordertodefineexposuresprecisely What is the purpose

1. A mechanic sells a brand of automobile tire that has a life expectancy that is normallydistributed, with a mean life of 24,000 miles and a standard deviation of 2500 miles. He wants to give a guarantee for free replacement of tires that don't wear well. How should he word his guarantee if he is willing to replace approximately 10% of the

It has been found that 50.8% of U.S. households own stocks and mutual funds. A random sample of 300 heads of households indicated that 173 owned some type of stock. At what level of significance would you conclude that this was a significant difference? Compute the Test Value: . 577 -.508 Sq rt of (.508)(.492)/300 I am not understanding the lower

An investor is trying to decide whether to invest in a given stock, but is worried about the volatility of the investment. If the investor is very certain that the volatility (as measured by the standard deviation) is greater than 15% then the investor will choose a different investment option. In a sample of the previous 101 days reveals that the

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It is possible for the feasible region of a linear program to have exactly one point. True False

A set of therapists are interested in testing whether spending time with a pet while a patient is hospitalized can reduce anxiety symptoms. They have some pre-existing knowledge to suggest that pet therapy is helpful, but they want to know whether the size of the pet matters. Below is a subset of their data: Small Dog Medium Dog Large Dog 6 3 4 5

. The director for Weight Watchers International wants to determine if the changes in their program results in better weight loss. She selected 25 Weight Watcher members at random and compared their weight 6 months later to weight at the start of the program. Here are the results: (The weight in the column labeled After represents their weights

Good Afternoon! The answer... is not what I need. I need calculations, simple answers. can you help me with it? Develop an Xbar and Rbar charts and determine if they are in control. Sample A B C D 1 142 153 124 130 2 124 156 145 157 3 124 137 130 128 4 158 156 123 127 5 148 128 140 138 6 149 140 133 159 7 136 140 142 146 8 127 142 154 133 9 137

MAT 109 Extra Credit Assignment Instructor: Name: Grade: Due Date: last day of the course Directions: This assignment consists of 8 parts of two Chapter Review problems and 4 parts of a Managing Ashland MultiComm Service case problem. Each fully correct part for #1, 2, and #3 is worth 4 points. Answers to the questions in #4 count for 6 points

Real Estate Regression Exercise QNT/351 Version 5 1 University of Phoenix Material Real Estate Regression Exercise Directions: Use the real estate data you used for your Week 2 learning team assignment. Analyze the data and explain your answers. You are consulting for a large real estate firm. You have been asked to construct a model that can

Use theAppendix Table for Normal Distribution to find cutoff z value (critical value) for the left-tailed test with the significance level 8%. 2.1 1.7 1.4 1.2

How do you know which statistical test is the appropriate one to use?

A taxi company is trying to decide whether to purchase brand A or brand B tires for its fleet of taxis. To estimate the difference in the two brands, an experiment was conducted using 12 of each brand. The results are as follows BrandA: x 1 = 36300 km , S 1 = 5000km BrandB:x 2 = 38100 km ,S 2 = 6100km

Suppose the heights of 18-year-old men are approximately normally distributed , with mean 67 inches and standard deviation 4 inches. (a) What is the probability that an 18-year-old man selected at random is between 66 and 68 inches tall? (Round your answer to four decimal places.) 1 (b) If a random sample of fifteen 18-year-old men is selected,

PSYC 355 SPSS HOMEWORK 5 INSTRUCTIONS: CORRELATION Part 1: Green & Salkind: Lesson 31 - Exercises 1, 3-4 The following helpful tips are numbered to correspond with the exercise number to which they refer (dashes indicate no tips are needed): 1. Paste the output. (2 pts) Instead of answering a-c from the text, answer the following questions in

The sampling distribution of differences between means approximates the normal curve whose __________ is zero. a. Mode b. Median c. Mean d. Standard deviation

In a certain city of several million people, 5.4% of the adults are unemployed. If a random sample of 245 adults in this city is selected, approximate the probability that more than 15 in the sample are unemployed. Use the normal approximation to the binomial with a correction for continuity . Round your answer to at least three decimal places. Do

ABC Securities Firm paid out record year-end bonuses of $150,000 per employee for 2005. Suppose we would like to take a sample of employees at the ABC Securities firm to see whether the mean year-end bonus is different from the reported mean of $150,000 for the population. a) State the null and alternative hypotheses you would use to test whether

Scenario 1 Y=4.613897+0.252581x1 Scenario 2 Y=-o.09335+0.357609x2 Scenario 3 Y=8.422334+2.155949x3 Scenario 4 Y=-0.0998+0.094052x3+0.235409x2 Scenario 5 Y=1.125502+0.185604x2+1.263737x3 Scenario 6 Y=-0.73649+0.17089x1+1.90868x3 Scenario 7 Y=-0.51533+0.034178x1+0.180748x2+1.237628x3 SUMMARY OUTPUT Regression Statistics Multiple R 0.712 R Square

11 Scenario: The president of the bicycle business has recently heard about the EOQ model and is interested in learning whether or not using this model would allow the company to reduce its annual costs by optimizing the number of orders placed each year and the number of bicycles purchased in each order. The estimated annual demand for the

The local government is considering implementing a roads and public transport infrastructure upgrade project. Before they commit to this however, they would like to canvas public opinion to gauge community support for such a project. If it they are convinced that more than 60% of the community support the proposed upgrade project, then the

Jake woke up late in the morning on the day that he has to go to school to take an important test. He can either take the shuttle bus which is usually running late 20% of the time or ride his unreliable motorcycle which breaks down 40% of the time. He decides to toss a fair coin to make his choice. 1.If Jake, in fact, gets to the test on time,

Please answer both questions correctlybelow asap. Thank you. Question8.19. The file Sedans contains the overall miles per gallon (MPG) of 2013 midsized sedans: 38 26 30 26 25 27 22 27 39 24 24 26 25 23 25 26 31 26 37 22 29 25 33 21 21 a. Construct a 95% confidence interval estimate for the poulation mean MPG of 2013 family sedans, assuming a

Problem set 3: use the following information to answer questions 8-10 (10 points total): We take another look at health based on the practice question on Page 408, this time examining the relationship between educational attainment and perceived quality of health care. Data for three groups are presented based on the HINTS2012 data set. Present

Here is the current status of your summary statistics: sample size sample mean sample standard deviation Females 50 98.4060 0.6557 Males 50 ??????? Enter the sample mean for the data on male body temperatures below. Remember to round off your value to exactly 4 decimal places. Male: 96.7, 96.9, 97.0, 97.1, 97.1, 97.2, 97.3, 97.4, 97.4, 97.4, 97.5,

Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7.5 grams of fat per pound. A random sample of 34 farm-raised trout is selected. The mean fat content for the sample is 31.5 grams per pound. Find the probability of observing a sample

The main difference between manipulation of an independent variable and observation of naturally occurring variations in an independent variable is that naturally occurring variations provide more persuasive evidence of a causal relationship involving the independent variable. manipulation provides more persuasive evidence of a causal relationship

A study was done regarding how the number of minutes given for a certain ten-point exam affected the resulting exam score. Forty students of similar academic profile were randomly selected and given the same exam. Each student was given a different time to complete the exam than any other student, and the sum of all the individual times given was

Categorical Data Analysis devise a test that performs a categorical data analysis. Consider at least two separate categories you would want to test. Consider and discuss the following: What are the categories, and do you assume these categories are related? What is the hypothesis? What is the level of significance? Use a 5% level of significance

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uick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a Quick Start battery is normally distributed, with a mean of 45.6 months and a standard deviation of 6.9 months. A) What percent of Quick Start batteries last less than 60.65 OR more than 72.25 months? %. Keep your

what is the difference between calculating simple and compound interest?

11. In testing a new drug, researchers found that 3% of all patients using it will have a mild side effect. A random sample of 9 patients using the drug is selected. (i) Find the probability that none will have this mild side effect. (ii) Find the probability that at least one will have this mild side effect. a) (i) 0.2398 (ii) 0.7602 b) (i)

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