Basic Business Statistics, Student Value Edition (13th Edition)
13th Edition
ISBN: 9780321946393
Author: Mark L. Berenson, David M. Levine, Kathryn A. Szabat
Publisher: PEARSON
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Chapter 12, Problem 39PS
The lengths of life (in hours) of a sample of 40 100-watt compact fluorescent light bulbs produced by Manufacturer A and a sample of 40 20-watt compact fluorescent light bulbs produced by Manufacturer B are stored in Bulbs.
a. Using a 0.05 level of significance, is there evidence of a difference in the
b. What assumption must you make in (a)?
c. Compare the results of (a) with those of problem 10.64 on page 382. Discuss.
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Chapter 12 Solutions
Basic Business Statistics, Student Value Edition (13th Edition)
Ch. 12 - Determine the critical value of 2 with 1 degree of...Ch. 12 - Determine the critical value of 2 with 1 degree of...Ch. 12 - Use the following contingency table: a. Compute...Ch. 12 - Use the following contingency table: a. Compare...Ch. 12 - Prob. 5PSCh. 12 - Prob. 6PSCh. 12 - Do males or females feel more tense or stressed...Ch. 12 - Prob. 8PSCh. 12 - Prob. 9PSCh. 12 - Prob. 10PS
Ch. 12 - Consider a contingency table, with two rows and...Ch. 12 - Use the following contingency table: a. Compute...Ch. 12 - Use the following contingency table: a. Compute...Ch. 12 - Prob. 14PSCh. 12 - Prob. 15PSCh. 12 - Social media users use a variety of devices to...Ch. 12 - Repeat (a) and (b) of Problem 12.16, assuming that...Ch. 12 - Prob. 18PSCh. 12 - Prob. 19PSCh. 12 - Prob. 20PSCh. 12 - Prob. 21PSCh. 12 - Prob. 22PSCh. 12 - Prob. 23PSCh. 12 - Prob. 24PSCh. 12 - Prob. 25PSCh. 12 - Prob. 26PSCh. 12 - Using Table E.6, determine the lower-and...Ch. 12 - Using Table E.6, determine the lower-tail critical...Ch. 12 - Prob. 29PSCh. 12 - Prob. 30PSCh. 12 - Prob. 31PSCh. 12 - The following information is available for two...Ch. 12 - From Problem 12.32 , at the 0.05 level of...Ch. 12 - In Problems 12.32 and 12.33, what is your...Ch. 12 - A vice president for marketing recruits 20 college...Ch. 12 - Prob. 36PSCh. 12 - Prob. 37PSCh. 12 - The management of a hotel has the business...Ch. 12 - The lengths of life (in hours) of a sample of 40...Ch. 12 - Brand valuations are critical to CEOs, financial...Ch. 12 - A bank with a branch located in a commercial...Ch. 12 - Prob. 42PSCh. 12 - Prob. 43PSCh. 12 - Prob. 44PSCh. 12 - A pet food company has the business objective of...Ch. 12 - A hospital conducted a study of the waiting time...Ch. 12 - Prob. 47PSCh. 12 - An advertising agency has been hired by a...Ch. 12 - Prob. 49PSCh. 12 - The more costly and time consuming it is to export...Ch. 12 - Prob. 51PSCh. 12 - Prob. 52PSCh. 12 - Prob. 53PSCh. 12 - Prob. 54PSCh. 12 - Prob. 55PSCh. 12 - Prob. 56PSCh. 12 - Prob. 57PSCh. 12 - Prob. 58PSCh. 12 - Prob. 59PS
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