a. Explanation Calculation: The given information is that, the summary statistic is s 1 = 5.1 , n 1 = 11 , s 2 = 3.2 and n 2 = 8 . Here, the direction of the test is two-tailed. State the hypotheses: Null hypothesis: H 0 : σ 1 2 σ 2 2 = 1 That is, the population variances are equal. Alternative hypothesis: H 1 : σ 1 2 σ 2 2 ≠ 1 That is, the population variances are not equal. Degrees of freedom for numerator: d f 1 = n 1 − 1 = 11 − 1 = 10 Degrees of freedom for denominator: d f 2 = n 2 − 1 = 8 − 1 = 7 Critical value: Software procedure: Step-by-step procedure to obtain the critical value using the MINITAB software: Choose Graph > Probability Distribution Plot > choose View Probability> OK. From Distribution , choose F . Enter Numerator df as 10 and Denominator df as 7 . Choose Probability Value and Both Tails for the region of the curve to shade Enter the value as 0 b. To determine Check whether the population variances are equal or not. c. To determine Check whether the population variances are equal or not.

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ISBN: 9781259957598

Author: DOANE

Publisher: RENT MCG

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Chapter 10.7, Problem 37SE

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Check whether the population variances are equal or not.

To determine

Check whether the population variances are equal or not.

To determine

Check whether the population variances are equal or not.

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Chapter 10.7, Problem 36SE

Chapter 10.7, Problem 38SE

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Chapter 10 Solutions

APPLIED STAT.IN BUS.+ECONOMICS

Ch. 10.2 - Do a two-sample test for equality of means...Ch. 10.2 - Repeat the previous exercise, assuming unequal...Ch. 10.2 - Is there a difference in the average number of...Ch. 10.2 - Prob. 4SE Ch. 10.2 - Prob. 5SE Ch. 10.2 - Prob. 6SE Ch. 10.2 - Prob. 7SE Ch. 10.2 - On a random basis, Bob buys a small take-out...Ch. 10.2 - For a marketing class term project, Bob is...Ch. 10.3 - A special bumper was installed on selected...

Ch. 10.3 - In trials of an experimental internet-based method...Ch. 10.3 - Construct a 95 percent confidence interval for the...Ch. 10.4 - (a) At = .05, does the following sample show that...Ch. 10.4 - An experimental surgical procedure is being...Ch. 10.4 - Blue Box is testing a new half price on Tuesday...Ch. 10.4 - The U.S. governments Cash for Clunkers program...Ch. 10.4 - Prob. 17SE Ch. 10.4 - Below is a random sample of shoe sizes for 12...Ch. 10.4 - A newly installed automatic gate system was being...Ch. 10.5 - Calculate the test statistic and p-value for a...Ch. 10.5 - Prob. 21SE Ch. 10.5 - Prob. 22SE Ch. 10.5 - Prob. 23SE Ch. 10.5 - Prob. 24SE Ch. 10.5 - Prob. 25SE Ch. 10.5 - A survey of 100 mayonnaise purchasers showed that...Ch. 10.5 - Prob. 27SE Ch. 10.5 - Prob. 28SE Ch. 10.5 - When tested for compliance with Sarbanes-Oxley...Ch. 10.5 - Prob. 30SE Ch. 10.5 - From a telephone log, an executive finds that 36...Ch. 10.5 - Prob. 32SE Ch. 10.6 - The American Bankers Association reported that, in...Ch. 10.6 - A study showed that 36 of 72 cell phone users with...Ch. 10.6 - Prob. 35SE Ch. 10.7 - Which samples show unequal variances? Use = .10...Ch. 10.7 - Prob. 37SE Ch. 10.7 - Prob. 38SE Ch. 10.7 - A manufacturing process drills holes in sheet...Ch. 10.7 - Examine the data below showing the weights (in...Ch. 10 - (a) Explain why two samples from the same...Ch. 10 - (a) In a two-sample test of proportions, what is a...Ch. 10 - List the three cases for a test comparing two...Ch. 10 - Consider Case 1 (known variances) in the test...Ch. 10 - Consider Case 2 (unknown but equal variances) in...Ch. 10 - Consider Case 3 (unknown and unequal variances) in...Ch. 10 - Why is it a good idea to use a computer program...Ch. 10 - (a) Explain why the paired t test for dependent...Ch. 10 - Explain how a difference in means could be...Ch. 10 - (a) Why do we use an F test? (b) When two...Ch. 10 - (a) In an F test for two variances, explain how to...Ch. 10 - Prob. 41CE Ch. 10 - In an early home game, an NBA team made 66 of...Ch. 10 - Prob. 43CE Ch. 10 - A recent study found that 202 women held board...Ch. 10 - A study of the Fortune 100 board of director...Ch. 10 - Prob. 46CE Ch. 10 - How many full-page advertisements are found in a...Ch. 10 - eShopNet, an online clothing retailer, is testing...Ch. 10 - After John F. 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Explain. a. The...Ch. 10 - Match each statement to the correct property of an...Ch. 10 - Concerning confidence intervals, which statement...Ch. 10 - Prob. 4ERQ Ch. 10 - Prob. 5ERQ Ch. 10 - Prob. 6ERQ Ch. 10 - Prob. 7ERQ Ch. 10 - Prob. 8ERQ Ch. 10 - The process that produces Sonora Bars (a type of...Ch. 10 - Prob. 10ERQ Ch. 10 - Prob. 11ERQ Ch. 10 - Last month, 85 percent of the visitors to the...Ch. 10 - Weights of 12 randomly chosen Sonora Bars (a type...Ch. 10 - In a random sample of 200 Colorado residents, 150...Ch. 10 - Five students in a large lecture class compared...Ch. 10 - Prob. 16ERQ Ch. 10 - Prob. 17ERQ

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Check whether the population variances are equal or not.

Solution Summary: The author concludes that the population variances are equal. The direction of the test is two-tailed.

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Chapter 10 Solutions