Essentials Of Statistics For Business & Economics
9th Edition
ISBN: 9780357045435
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub
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Textbook Question
Chapter 7.2, Problem 1E
Consider a finite population with five elements labeled A, B, C, D, and E. Ten possible simple random samples of size 2 can be selected.
- a. List the 10 samples beginning with AB, AC, and so on.
- b. Using simple random sampling, what is the
probability that eachsample of size 2 is selected? - c. Assume random number 1 corresponds to A, random number 2 corresponds to B, and so on. List the simple random sample of size 2 that will be selected by using the random digits 8 0 5 7 5 3 2.
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I just need to know why this is wrong below:
What is the test statistic W? W=5 (incorrect)
and
What is the p-value of this test? (p-value < 0.001-- incorrect)
Use the Wilcoxon signed rank test to test the hypothesis that the median number of pages in the statistics books in the library from which the sample was taken is 400. A sample of 12 statistics books have the following numbers of pages
pages
127
217
486
132
397
297
396
327
292
256
358
272
What is the sum of the negative ranks (W-)? 75 What is the sum of the positive ranks (W+)? 5What type of test is this? two tailedWhat is the test statistic W? 5 These are the critical values for a 1-tailed Wilcoxon Signed Rank test for n=12
Alpha Level
0.001
0.005
0.01
0.025
0.05
0.1
0.2
Critical Value
75
70
68
64
60
56
50
What is the p-value for this test? p-value < 0.001
Chapter 7 Solutions
Essentials Of Statistics For Business & Economics
Ch. 7.2 - Consider a finite population with five elements...Ch. 7.2 - Assume a finite population has 350 elements. Using...Ch. 7.2 - Industrial Stock Performance. Fortune publishes...Ch. 7.2 - The 10 most active stocks on the New York Stock...Ch. 7.2 - A student government organization is interested in...Ch. 7.2 - 6. The County and City Data Book, published by the...Ch. 7.2 - 7. Assume that we want to identify a simple random...Ch. 7.2 - Prob. 8ECh. 7.2 - Returns on Mutual Finds. The Wall Street Journal...Ch. 7.2 - 10. Indicate which of the following situations...
Ch. 7.3 - The following data are from a simple random...Ch. 7.3 - Prob. 12ECh. 7.3 - 13. A sample of 5 months of sales data provided...Ch. 7.3 - 14. Morningstar publishes ratings data on 1208...Ch. 7.3 - Rating Wines. According to Wine-Searcher, wine...Ch. 7.3 - AARP Survey. In a sample of 426 U.S. adults age 50...Ch. 7.3 - Attitudes Toward Automation. The Pew American...Ch. 7.5 - 18. A population has a mean of 200 and a standard...Ch. 7.5 - A population has a mean of 200 and a standard...Ch. 7.5 - 20. Assume the population standard deviation is σ...Ch. 7.5 - 21. Suppose a random sample of size 50 is selected...Ch. 7.5 - Sampling Distribution for Electronic Associates,...Ch. 7.5 - Finding Probabilities for Electronic Associates,...Ch. 7.5 - Barrons reported that the average number of weeks...Ch. 7.5 - SAT Scores. In May 2018, The College Board...Ch. 7.5 - Federal Income Tax Returns. The Wall Street...Ch. 7.5 - College Graduate-Level Wages. The Economic Policy...Ch. 7.5 - State Rainfalls. The state of California has a...Ch. 7.5 - Income Tax Return Preparation Fees. The CPA...Ch. 7.5 - To estimate the mean age for a population of 4000...Ch. 7.6 - A sample of size 100 is selected from a population...Ch. 7.6 - 32. A population proportion is .40. A sample of...Ch. 7.6 - Prob. 33ECh. 7.6 - 34. The population proportion is .30. What is the...Ch. 7.6 - Orders from First-Time Customers. The president of...Ch. 7.6 - The Wall Street Journal reported that the age at...Ch. 7.6 - Food Waste. In 2017, the Restaurant Hospitality...Ch. 7.6 - Unnecessary Medical Care. According to Readers...Ch. 7.6 - Better Business Bureau Complaints. In 2016 the...Ch. 7.6 - 40. The Grocery Manufacturers of America reported...Ch. 7.6 - 41. The Food Marketing Institute shows that 17% of...Ch. 7.9 - A population has a mean of 400 and a standard...Ch. 7.9 - Assume the population standard deviation is = 25....Ch. 7.9 - Prob. 44ECh. 7.9 - Assume that the population proportion is .44....Ch. 7.9 - Vacation Hours Earned by Blue-Collar and Service...Ch. 7.9 - MPG for New Cars. The New York Times reported that...Ch. 7.9 - Repeat Purchases. The president of Colossus.com,...Ch. 7.9 - Landline Telephone Service. According to the U.S....Ch. 7 - Shadow Stocks. Jack Lawler, a financial analyst,...Ch. 7 - Personal Health Expenditures. Data made available...Ch. 7 - 44. Foot Locker uses sales per square foot as a...Ch. 7 - Airline Fares. The mean airfare for flights...Ch. 7 - After deducting grants based on need, the average...Ch. 7 - Prob. 55SECh. 7 - Survey Research Results. A researcher reports...Ch. 7 - Production Quality Control. A production process...Ch. 7 - Australians and Smoking. Reuters reports that 15...Ch. 7 - 51. A market research firm conducts telephone...Ch. 7 - Advertisers contract with Internet service...Ch. 7 - The proportion of individuals insured by the...Ch. 7 - Lori Jeffrey is a successful sales representative...Ch. 7 - Life of Compact Fluorescent Lights. In 2018, the...Ch. 7 - Typical Home Internet Usage. According to USC...Ch. 7 - Undeliverable Mail Pieces. Of the 155 billion...Ch. 7 - U.S. Drivers and Speeding. ABC News reports that...Ch. 7 - Managerial Report Prepare a managerial report that...
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