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Mathematics Questions and Answers March 05, 2023

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The patient was admitted with an open fracture of the base of the skull with subarachnoid hemorrhage and expired without regaining consciousness. The patient fell from a ladder while working on re-roofing a single family home in his job as a roofing subcontractor. Assign only the correct external cause codes for this encounter. My course is

In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equal-size towels were used, with four sections of towels tested per brand. The absorbency rating data follow. At a .05 level of significance, does there appear to be a difference in the ability of the brands to absorb water?

what is the difference between qualitative data and quantitative data

what is the probability of obtaining a head if a fair coin is tossed twice

a) Fill in the blanks in the following tables. The column labeled \"Seq SS\" represents \"sequential sums of squares\" (measures the reduction in the SS when a term is added to a model that contains only the terms before it), while the column labeled \"Adj SS\" represents \"adjusted sums of squares\" (measures the reduction in the SS for each term

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Question 1 A survey of 30 supermarkets reported these numbers of sales held during a randomly selected year. Number of Sales Frequency 8-12 13-17 18-22 23-27 28-32 33-37 1 4 10 5 4 6 A. Calculate

Use this table for the following question. Supplier Number Conforming Number Nonconforming A 105 3 B 185 6 C 60 2 What is the probability of that a randomly selected part will be from supplier B, or a nonconforming unit from supplier A, or a conforming part from supplier C? 0.7036 0.6846 0.6620 0.5761 The number of cell phone minutes used by high

1.For a test of Upper H0: p=0.50, the z test statistic equals 1.50. Find theP-value for Upper Ha: p>0.50. 2.For a test of Upper H 0 : p=0.50,the sample proportion is 0.44 based on a sample size of 100.Find the test statistic z. 3. Results of 9 9 % confidence intervals are consistent with results of two-sided tests with which significance level?

l':i WS: .-Xssii'nmcn 6 . r. x 'x 5qu. Yes, since the coins do not seem to come if"; B. No Q C. Yes, since coins d Ci E. The resul' ):;://x l it C C. Reject HO. There is sufficient evidence to warrant rej -. L it 2 Ilomcwork-l'umclu Moore ' ' "fi "fl; ("Vl'll . . < JUIclllUll ,irirl llhltlhlJl' d rwl , i tlH ASS. me mat a SSmD'e random sam l= lns

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The lengths of time(in years) it took a random sample of 32former smokers to quit smoking permanently are listed. Assume the population standard deviation is 5.7years. At =0.09 ,is there enough evidence to reject the claim that the mean time it takes smokers to quit smoking permanently is 13years? Identify the standardized test statistic.

2311-Exercise-Set-6_1 Use the random digit table to answer the question. You are asked to conduct an interview of 6 randomly selected employees at your company to answer insurance questions. Use the random digit table starting at line 139 to choose 6 of the following individuals to be interviewed Agarwal Anderson Baxter Bonds Bowman Castillo Cross

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Find y'' y=tanx I know that y'= sec 2 x but I'm not sure what to do from there

Research the latest statistics on probation and parole in the U.S. at THIS LINK . In a narrative format of 500 or more words, outline parole and probation in the United States. Cite relevant changes, trends and other information to give an accurate overview of the current situation

ACT scores have a mean () of 18 and a standard deviation () of 6. Suppose that we are taking a simple random sample of 100 students from one high school. [25 points] a. Calculate the standard error of the mean. b. If we were to repeatedly pull samples of 100 individuals from the population of all ACT test takers, the distribution of sample means

7-7 Lindsay is 25 years old and has a new job in web development. Lindsay wants to make sure she is financially sound in 30 years, so she plans to invest the same amount into a retirement account at the end of every year for the next 30 years. (a) Construct a data table in Excel that will show Lindsay the balance of her retirement account for

The Service Club is choosing members at random to attend one of four conferences in LA, Atlanta, Chicago, and NY. There are 20 members in the club. What is the probability that Lana, Sherry, Miguel, and Jerome are chosen for these trips?

Name: Date: Hypothesis Testing Answer each question completely to recieve full credit 1. There is a new drug that is used to treat leukemia. The following data represents the remission time in weeks for a random sample of 21 patients using the drug. 10 11 10 7 20 34 32 19 32 23 6 25 22 17 13 6 35 9 16 6 6 Let X be a random variable representing

Looking for homework solutions for Columbia Stat/Math G6505, Spring 2016

X1, X2, X3, X4 are iid, and they follow the N(0, 1). X1, X2, X3, X4 ~ N(0,1). W follows N(5,9), W ~ N(5, 9). X m = (1/4)(X1+X2+X3+X4).V1, V2 are iid, and follows chi square distribution, V1,V2 2(4) For the random variable Y has either a 2 distribution, t-distribution, or normal distribution. Identify Y using mgf or cdf. Please provide specific

hola mi pregunta es cuantos enteros positivos n se pueden formar con los digitos 3,4,4,5,5,6,7si queremos que n sea mayor que 5.000.000? gracias :D

Enter the Data set (see next page: 50 samples of employee of two offices in Dubai & Abu Dhabi) into MINITAB stat software, run the required analysis, and answer the following questions: 1- What type of sampling technique was used to collect the data? 2- What is the type of Gender data? Present the Gender of Abu Dhabi office employee graphically?

In Professor Friedman's economics course the correlation between the students' total scores before the final examination and their final examination scores isr=0.64. The pre-exam totals for all students in the course have mean289and standard deviation28. The final exam scores have mean78and standard deviation10. Professor Friedman has lost Julie's

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Not all visitors to a certain company's website are customers. In fact, the website administrator estimates that about 5% of all visitors to the website are looking for other websites. Assuming that this estimate is correct, find the probability that, in a random sample of 4 visitors to the website, exactly 3 actually are looking for the website.

Module One Homework General: Before beginning this homework, be sure to read the textbook readings and the module notes. For additional practice, each homework problem has some ungraded examples and sample problems from the text that you can review, and they directly correspond with your graded homework. Work on those problems if needed, and post

a) What is the mean difference in credit card debt of the two groups in the original data? The mean difference in credit card debt of the two groups sits at - 879.1389. b) What p-value did you get in your randomization? Explain in the context of the problem what the p-value means. The P value that was derived from this randomization is 0.402. c)

A company that manufactures skateboards has a fixed cost of $100,000. It cost $100 to produce each skateboard. The selling price price per skateboard is $300 per board. Let x = the number of skateboards produced and sold. What is the break-even point? How do I find the break even point

The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a DVD player made by the company over the past 12 months are satisfied with their products. Which of the following will be a good frame for drawing a sample? Select one: a. a list of potential

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\fMA - 135 Prof. Giunta Research Project You are doing research on balance and fitness. To complete this research you will need a watch with a second hand. Identify a random sample of n = 12 men and n = 8 women. Have each subject perform the following task: a) Have the subjects stand with their hands at their side, raise one knee, cross their

Q.....Grade point averages of math majors at a large distance educationuniversity are normally distributed with a mean of2.85and a standarddeviation of0.30. If a random sample of 25 math majors is selectedfrom that university, what is theprobability that the sample mean gradepoint average will be a.either less than 2.709 or more than 2.955?......6

A brewery has a beer dispensing machine that dispenses beer into the company's 12 ounce bottles. The distribution for the amount of beer dispensed by the machine follows a normal distribution with a standard deviation of 0.17 ounce. The company can control the mean amount of beer dispensed by the machine. What value of the mean should the company

Final Exam - HIMS 650 Fall 2015 SOLUTIONS Directions: Please answer all questions. There are 14 questions and the exam is worth 25% of your total grade. The questions are not equally weighted. The point value for each question is listed below (100 points total). Data needed to complete the exam are contained in this Excel file. All answers are to

Stat 401: Applied Statistical Methods II Fall 2015 Homework #3 Due Date: 10/2/2015 (in your lab) Use your own paper. Make sure to indicate your name and your GSI's name and Lab section clearly on your solution sheets. Please write your name on each sheet, and staple the sheets. Show all key steps. A table of the z-values for the normal

In hypothesis testing, when should the researcher use theZ testor the student"t"test? Discuss and offer examples.

Consider H0:=100 versus H1:100. A random sample of 62 observations produced a sample mean of 96. Using =0.025, would you reject the null hypothesis? The population standard deviation is known to be =14. Reject the null hypothesis.Do not reject the null hypothesis.

Suppose that a certain college class contains 63 students. Of these, 30 are seniors, 37 are history majors, and 6 are neither. A student is selected at random from the class. (a) What is the probability that the student is both a senior and a history major? (b) Given that the student selected is a history major, what is the probability that he is

compute 99% confidence intervals for the average daily maximum temperature in February for each of the three years in which you collected data. How do they compare?

I'm having a hard time understanding the difference in t distributions and normal distributions when it comes to calculating the statistics. Infants, even newborns, prefer to look at attractive faces compared to less attractive faces (Slater, et al.,1998). In the study, infants from 1 to 6 days old were shown to photographs of womens

I need the Solution Manual for Introduction to Probability and Statistics By William Mendenhall, Robert Beaver, Barbara Beaver. I have solution 2 and 3. I need solution 1 (chapter 1 to 5 )

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1. Suppose a quiz has 10 multiple choice questions. Each question has 4 answer choices. If a student takes the quiz and randomly guesses on every question.... a) Find the probability the student gets between 2 and 7, exclusive, questions correct. b) Find the probability the student gets more than 6 questions correct. 2. One state lottery has 500

Lorimar Watch Company manufactures travel clocks. The daily marginal cost function associated with producing these clocks is C'(x) = 0.000009x2 - 0.009x + 8 where C'(x) is measured in dollars/unit and x denotes the number of units produced. Magagement has determined that the daily fixed cost incurred in producing these clocks is $120. Find the

4 Discuss one (1) project where you used a problem-solving approach to address what turned out to be common-cause variation, or where you used a process improvement approach to deal with a special cause. If you do not have a personal experience that echoes either of these situations, you may use Internet to search for a case that reflects either

In a random sample of 300 elderly men, 65% were married, while in a random sample of 400 elderly women, 48% were married. Which of the following is the 99% confidence interval estimate for the difference between the proportion of elderly men and the proportion of elderly women who are married? 0.56 0.067 0.560.067 0.17 0.073 0.170.073 0.17 0.096

An increase in the market price of men's haircuts, from $20per haircut to $30per haircut, initially causes a local barbershop to have its employees work overtime to increase the number of daily haircuts provided from 20to 25. When the $30market price remains unchanged for several weeks and all other things remain equal as well, the barbershop

lim of (t^3/(tan^3(2t))) as t->0 I know the answer is 1/8, but I do not understand where the 8 comes into play. If you can post the steps you took to get the answer that would be great!:)

Page 1 of 7 Instructions: Record your answers and work in the space below each problem. Be sure to record the final answer next to \"Answer\" and show all your calculation steps or assumptions under \"Work.\" You can type in your calculations, use the equation tool, or insert images of your handwritten calculations. If you have a tablet with a

18. Determine the value of the following limit. Give your answer correctly rounded to 4 decimal places. Anything else will be graded as wrong. lim x1 (6ex 3x + 17)

2 (Please show the work. Thank you.) In PC Tech's product mix problem, assume there is another PC model, the VXP, that the company can produce in addition to Basics and XPs. Each VP requires eight hours for assembling, three hours for testing. $275 for component parts, and sells for $560. At most 50 VXPs can be sold. a) Modify the spreadsheet

Price Rooms Neighborhood 309.6 7 0 307.4 8 0 340.3 9 0 346.5 12 0 298.2 6 0 337.8 9 0 324.1 10 0 313.2 8 0 327.8 9 0 325.3 8 0 308.5 6 1 381.3 13 1 337.4 10 1 346.2 10 1 342.4 9 1 323.7 8 1 329.6 8 1 343.6 9 1 360.7 11 1 348.3 9 1 A real estate association in a suburban community would like to study the relationship between the size of a

Example:We are interested in comparing dollar amounts that three local college students spend for textbooks. We will take a sample of size 100 studentsfrom each college. We will use a survey to get the information about amounts tospend textbook, class year, gender and major. We will use ANOVA test to comparemeans of dollar amounts for textbooks.

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used to estimate this probability. If so, approximate P(X) using the normal distribution and compare the result with the exact probability. n equals=62, p equals=0.4, and X equals= 18 I know 62/18 but cannot understand how they come up with

A college library has five copies of a certain text on reserve. Two copies (1 and 2) are first printings, and the other three (3, 4, and 5) are second printings. A student examines these books in random order, stopping only when a second printing has been selected. One possible outcome is 4, and another is 125. Let A denote the event that exactly

The statistical methods used in forecasting are: A.Formal forecasting B.Methods of prediction of the future C.Multiple Regression Analysis, Nonlinear Regression, Decomposition Method, Moving Average Analysis, Weighted Moving Averages, and Exponential Smoothing. D.None of the above Moving Average Forecasting forecasts future values based on a

From Data to Decision page 565 Critical Thinking: Should you approve this drug? Drugs must undergo thorough testing before being approved for general use. In addition to testing for adverse reactions, they must also be tested for their effectiveness, and the analysis of such test results typically involves methods of statistics. Consider the

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A paint manufacturer made a modification to a paint to speed up its drying time. Independent simple random samples of 11 cans of type A (the original paint) and 9 cans of type B (the modified paint) were selected and applied to similar surfaces. The drying times, in hours, were recorded. The summary statistics are as follows. Type A Type B x1 =

Explain how the null hypothesis can be rejected from the perspectives of F-statistic and p-value.

Three research departments have 6, 8, and 10 members, respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done?

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A random sample of ten households having landline telephone services in your community was conducted. The monthly expenses for landline telephone service at the selected ten households were as follows: $/month 47, 39, 42, 51, 36, 51, 42, 39, 41, 55 Determine a 95% confidence interval for the average monthly expenditure for landline telephone

Under what circumstances is the computational formula preferred over the definitional formula when computing SS, the sum of squared deviations, for a sample?

An important part of any dispensing process is statistical quality control. At the Billy Goat Gruff Inn, machines are set to dispense 600 ml of soda into every customer's glass. Over time, however, the machine can get out of control and dispense too much soda or too little. The machine needs adjustment if the mean amount dispensed is different

Suppose that 50% of all babies born in a particular hospital are boys. If 6 babies born in the hospital are randomly selected, what is the probability that at least 2 of them are boys? Carry your intermediate computations to at least four decimal places, and round your answer to at least two decimal places.

which distribution has the smallest spread? u=1 o=4 u=2 o=3, u=3 o=2, u=4 o=1?

Read the article on "How Confidence Intervals are Used In Business" in the Instructor Insights tab for Week 7 (http://smallbusiness.chron.com/confidence-interval-affects-business22021.html) . Provide one example of how a confidence interval could be used in a business, sports, health care, political, etc. environment. Please identify a level of

49%of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan. Find the probability that the number who consider themselves baseball fans is (a) exactly five, (b) at least six, and (c) less than four. (a) P(5)= (Round to three decimal places as needed.) (b)

1)True or False: a)Goodness of fit tests are right-tailed b)The expected frequencies for a Goodness of Fit test are computed by taking the proportion of n designated by the proposed distribution. c) Suppose that a chi-square test of independence using a contingency table is to be conducted to compare 5 sources of fraud against 2 genders, the

The data in Excel: Open the file Excel file. You should see two data sets, obtained from two independent samples. Let's imagine that these data come from an experiment in which a researcher aimed to determine whether reading a chapter first and then going to a lecture is a better learning method than going to a lecture first and then reading the

An airline charges the following baggage fees: $25 for the first bag and $35 for the second. Suppose 42% of passengers have no checked luggage, 36% have one piece of checked luggage and 22% have two pieces. We suppose a negligible portion of passengers check more than two bags. Calculate the corresponding standard deviation. Give your answer to

The total number of passengers riding a certain city bus during the morning shift is 900. If the child's fare is $.10, the adult fare is $.55, and the total revenue from the fares in the morning shift is 360, how many children and how many adults rode the bus during the morning shift? ____________ children ____________ adults

2. To build up central limit theorem by following steps: Step 1, to generate a uniform distribution x(I) between 0 and 1, and plot it Step 2, by randomly adding any two x(I) to have another distribution and plot it, Step 3, repeat the step 2 for two more times and plot these two distributions. Step 4, Use normal distribution to fit the above 4

\fDocumentation for Guns Data Growth is a balanced panel of data on 50 US states, plus the District of Columbia (for a total of 51 \"states\"), by year for 1977 - 1999. Each observation is a given state in a given year. There are a total of 51 states 23 years = 1173 observations. These data were provided by Professor John Donohue of Stanford

According to the "January theory," if the stock market is up for the month of January, it will be up for the year. If it is down in January, it will be down for the year. According to an article inThe Wall Street Journal, this theory held for 28 out of the last 34 years. Suppose there is no truth to this theory; that is, the probability it is

If a researcher rejects a null hypothesis, the researcher is either Select one: a. correct or committed a Type I errorb. correct or committed a Type II errorc. incorrect or committed a Type I errord. None of the above

ID NUMBER:_______________________ NAME: ______________ SECTION:_____ ASSIGNMENT - Answer the questions for each exercise. If there is a need for computed answers, solve and write the correct answers from your computed values in the blanks provided. Exercise 1. Select the correct answer and write the appropriate letter in the space provided.

a firm makes and sells a computer for a 1000.the variable cost to produce a computer, for the range of production of the firm, $300 per unit. The total fixed costs per year to make the computer are $4.0 million. How many computers must be made and sold,given this information, before the firm makes a profit? How many must be made and sold to earn a

Explain the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented? Support you answer with APA reference

I am able to answer the entire question except part C. For whatever reason when adding the constraint on to the solver in Excel, it does not give the correct answers. Blair & Rosen, Inc. (B&R) is a brokerage firm that specializes in investment portfolios designed to meet the specific risk tolerances of its clients. A client who contacted B&R this

Customers call a customer service telephone line at an average rate of 20 calls per hour. (a) What is the expected amount of time one would need to wait for the first call of the day? Write down the reason behind your answer. (b) What is the expected amount of time one would need to wait for the tenth call of the day? Write down the reason behind

10 red marbles and 10 blue marbles are placed into a bag. Alex mixes up the bag and randomly selects a marble. He continues to do so, replacing the marble after each selection, until a red marble is selected. (10 points) What is the probability that the first time that a red marble is pulled is on Alexs 6 th try? On average, how many marbles will

Find the value of limit for the function. limx 0 f(x), where f(x) = x(x+1)/ x if x 0 0 if x = 0

Prove that if two functions are onto each other then their composite is also an onto function.

pain Relief No pain Relief New Medication 44 76 Placebo 21 99 a. Estimate the risk difference in pain relief between treatment b. Estimate the relative risk in pain relief between treatment. c. Estimate the odds ratio in pain relief between treatment The upper and lower limits of the OR are shown below Lower Limit of CI: 0.41 Upper Limit of CI:

1\u0000)\u0000 \u0000I\u0000f\u0000 \u0000t\u0000h\u0000e\u0000 \u0000P\u0000e\u0000a\u0000r\u0000s\u0000o\u0000n\u0000'\u0000s\u0000 \u0000c\u0000o\u0000r\u0000r\u0000e\u0000l\u0000a\u0000t\u0000i\u0000o\u0000n\u0000 \u0000c\u0000o\u0000e\u0000f\u0000f\u0000i\u0000c\u0000i\u0000e\u0000n\u0000t\u0000

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Ronnie Cox has just inherited $27,000. How much of this money should he set aside today to have $18000 to pay cash for a Ventura Van, which he plans to purchase in one year? He can invest at 1.8% annually, compounded annually. The amount of money to be set aside is $ (Round to the nearest cent as needed.)

given that x has a poisson distribution with u=1.8 what is the probability that x=5 p(5) = round to four decimal places as needed

2: Portfolio Optimization In the accompanying data (Portfoliodata.txt) file, you are given monthly returns of four stocks: JCPenney, Amoco, GM and JPMorgan for 240 months during the 20 year period from 1975 to 1994. We are interested in developing optimal portfolios (in Markowitz' sense) using this data. In so doing, you will go through the

In an experiment withN= 6 andP real = 0.15, what is the power usinga= 0.01 2 tail ? 0.5000 0.0000 1.0000 0.3771

I need my final done for me math 221 chamberlain college of nursing

LetX1........,X49be independent normal random variables with mean 6 and standard deviation 5. Find the 85th percentile of the distribution of their sample mean.

Question 1: An economist claims that the average Hispanic owned business generates revenues of less than $70,000 annually. A random survey of 10 Hispanic owned businesses revealed an average annual revenue of $58,600 with a standard deviation of $18,000. Assume a normal population. We wish to test the economist's claim, at a 10% significance

Ifp(A) = 0.6 andp(B) = 0.5, thenp(B|A) equals ____. 0.8333 0.5000 0.3000 cannot be determined from the information given

Analysis of variance method should not be used for assessing the statistical significance of a regression model. True or False

Examine the computation formula for r, the sample correlation coefficient. (a) In the formula for r, if we exchange the symbols x and y, do we get a different result or do we get the same (equivalent) result? Explain your answer. The result is the same because the formula is dependent on the symbols The result is the same because the formula is

S6.20 Jamison Kovach Supply Company manufactures paper clips and other office products. Although inexpensive, paper clips have provided the firm with a high margin of profitability. Sample size is 200. Results are given for the last 10 samples

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