BASIC BUSINESS STATISTICS
14th Edition
ISBN: 9780135285923
Author: MARK BERENSON
Publisher: PEARSON
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Chapter 10, Problem 62PS
A Computer information systems professor is interested in studying the amount of time if takes students enrolled in the introduction to Computers course to write a program in VB.NET. The professor hires you to analyse the following results (in minutes), from a random sample of nine students:
a. At the 0.05 level of significance, is there evidence that the population
b. Suppose that the professor, when checking her results, realize that the fourth student 51 minutes rather than the recorded 15 minutes to write the VB.NET program. At THE 0.05 level of significance, reanalyse the question posted in (a), using the revised data. What will you tell the professor now?
c. The professor is perplexed by these paradoxical results and requests an explanation from you regarding the justification for the difference in your findings in (a) and (b). Discuss.
d. A few days later, the professor calls to tell you that the dilemma is completely resolved. The Original number 15 (the fourth data value) was “correct� and therefore your finding in (a) are being used in the article she is writing for a computer journal. Now she wants to hire you to compare the results from that group of Introduction to Computers students against those from a sample of II computer majors, the sample mean 8.5 minutes, and the sample standard deviation is 2.0 minutes. At the 0.05 level of significance, completely analyse these data. What will you tell the professor?
e. A few days later, the professor calls again to tell you that a reviewer of her article wants her to include the p-values for the “correct� result in (a). in addition, the professor inquires about an unequal-variances problem, which the reviewer wants her to discuss in her article. In your own words, discuss the concept of p-value and also describe the unequal-variances problem. Then, determine the p-value in (a) and discuss whether the unequal-variances problem had any meaning in the professor’s study.
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Chapter 10 Solutions
BASIC BUSINESS STATISTICS
Ch. 10 - If you have samples of n1=12andn2=15, in...Ch. 10 - Assume that you have a sample of n1=8, with the...Ch. 10 - What assumptions about the two populations are...Ch. 10 - Referring to Problem 10.2, construct a 95...Ch. 10 - Prob. 5PSCh. 10 - Referring to Problem 10.2, if n1=5andn2=4, at the...Ch. 10 - When people make estimates, they are influenced by...Ch. 10 - A recent study found that 51 children who watched...Ch. 10 - Is there a difference in the satisfaction rating...Ch. 10 - Accounting Today Identified the top accounting...
Ch. 10 - The annual NFL Super Bowl is the most widely...Ch. 10 - A bank with a branch located in a commercial...Ch. 10 - Repeat Problem 10.12 (a), assuming that the...Ch. 10 - As a member of the international strategic...Ch. 10 - Repeat Problem 10.14 (a), assuming that the...Ch. 10 - Prob. 16PSCh. 10 - Brand valuations are critical to CEOs, financial...Ch. 10 - Prob. 18PSCh. 10 - Prob. 19PSCh. 10 - Nine experts rated two brands of coffee in...Ch. 10 - How do the rating of TV and Internet services...Ch. 10 - Prob. 22PSCh. 10 - How do the fares for airlines that directly...Ch. 10 - Multiple myeloma, or blood plasma cancer, is...Ch. 10 - Prob. 25PSCh. 10 - The file Concrete1 contains the compressive...Ch. 10 - Prob. 27PSCh. 10 - Prob. 28PSCh. 10 - An online survey asked 1,004 adults “if...Ch. 10 - Does Cable Video-on Demand VODD4+ increase ad...Ch. 10 - Are you an impulse shopper? A survey of 500...Ch. 10 - The Society for Human Resource Management (SHRM)...Ch. 10 - What social media tools do marketers commonly use?...Ch. 10 - Prob. 34PSCh. 10 - Prob. 35PSCh. 10 - Prob. 36PSCh. 10 - Prob. 37PSCh. 10 - Prob. 38PSCh. 10 - The following information is available is for two...Ch. 10 - In Problem 10.39, how many degrees of freedom are...Ch. 10 - In problem 10.38 and 10.39, what is the upper-tail...Ch. 10 - In Problem 10.39, what is your statistical...Ch. 10 - The following information is available for two...Ch. 10 - Prob. 44PSCh. 10 - Prob. 45PSCh. 10 - Prob. 46PSCh. 10 - A bank with a branch located in a commercial...Ch. 10 - The annual NFL Super Bowl is the most widely...Ch. 10 - Prob. 49PSCh. 10 - Prob. 50PSCh. 10 - Prob. 51PSCh. 10 - Prob. 52PSCh. 10 - Prob. 53PSCh. 10 - What is the distinction between two independent...Ch. 10 - Prob. 55PSCh. 10 - Prob. 56PSCh. 10 - Prob. 57PSCh. 10 - The American Society for Quality (ASQ) conducted a...Ch. 10 - How do private universities and public colleges...Ch. 10 - Do males and females differ in the amount of time...Ch. 10 - The file Restaurants contains the rating for food,...Ch. 10 - A Computer information systems professor is...Ch. 10 - Do social shoppers differ other online consumers...Ch. 10 - Prob. 64PSCh. 10 - Prob. 65PSCh. 10 - Prob. 66PSCh. 10 - Prob. 67PSCh. 10 - Prob. 68PSCh. 10 - Prob. 69PSCh. 10 - Referring to the results of Problems 10.67 and...
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