Mathematical Statistics with Applications

7th Edition

ISBN: 9780495110811

Author: Dennis Wackerly, William Mendenhall, Richard L. Scheaffer

Publisher: Cengage Learning

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Textbook Question

Chapter 15.3, Problem 5E

New food products are frequently subjected to taste tests by a panel of judges. The judges are usually asked to state a preference for one food over another so that no quantitative scale need be employed. Suppose that two new mixtures, A and B, of an orange-flavored drink are presented to ten judges. The preferences of the judges are given in the accompanying table. Does this evidence indicate a significant difference between the tastes of A and B, at the 5% significance level?

Chapter 15.3, Problem 5E, New food products are frequently subjected to taste tests by a panel of judges. The judges are

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Chapter 15.3, Problem 4E

Chapter 15.3, Problem 6E

Chapter 15 Solutions

Mathematical Statistics with Applications

Ch. 15.3 - What significance levels between = .01 and = .15...Ch. 15.3 - Prob. 2E Ch. 15.3 - Clinical data concerning the effectiveness of two...Ch. 15.3 - Prob. 4E Ch. 15.3 - New food products are frequently subjected to...Ch. 15.3 - On clear, cold nights in the central Florida...Ch. 15.3 - A psychological experiment was conducted to...Ch. 15.3 - Refer to Exercise 12.15. Using the sign test, do...Ch. 15.3 - Prob. 9E Ch. 15.4 - The accompanying table gives the scores of a group...

Ch. 15.4 - Refer to Exercise 15.4. What answers are obtained...Ch. 15.4 - Refer to Exercise 15.6(a). Answer the question by...Ch. 15.4 - Eight subjects were asked to perform a simple...Ch. 15.4 - Two methods, A and B, for controlling traffic were...Ch. 15.4 - Dental researchers have developed a new material...Ch. 15.4 - Refer to Exercise 12.16. With = .01, use the...Ch. 15.4 - Suppose that Y1, Y2,, Yn is a random sample from a...Ch. 15.4 - The spokesperson for an organization supporting...Ch. 15.6 - Find the p-values associated with each of the...Ch. 15.6 - In some tests of healthy, elderly men, a new drug...Ch. 15.6 - Two plastics, each produced by a different...Ch. 15.6 - Prob. 24E Ch. 15.6 - Prob. 25E Ch. 15.6 - Prob. 26E Ch. 15.6 - Prob. 27E Ch. 15.6 - Prob. 28E Ch. 15.7 - The table that follows contains data on the leaf...Ch. 15.7 - Prob. 30E Ch. 15.7 - Three different brands of magnetron tubes (the key...Ch. 15.7 - An experiment was conducted to compare the length...Ch. 15.7 - Prob. 33E Ch. 15.7 - Prob. 34E Ch. 15.7 - Prob. 35E Ch. 15.8 - In a study of palatability of antibiotics for...Ch. 15.8 - Prob. 38E Ch. 15.8 - Prob. 39E Ch. 15.8 - A serious drought-related problem for farmers is...Ch. 15.8 - Prob. 41E Ch. 15.8 - Prob. 42E Ch. 15.8 - Prob. 43E Ch. 15.8 - Prob. 44E Ch. 15.8 - Prob. 45E Ch. 15.9 - Prob. 46E Ch. 15.9 - Prob. 47E Ch. 15.9 - Prob. 48E Ch. 15.9 - Prob. 49E Ch. 15.9 - Prob. 50E Ch. 15.9 - Prob. 52E Ch. 15.10 - Prob. 53E Ch. 15.10 - Prob. 54E Ch. 15.10 - Prob. 55E Ch. 15.10 - Prob. 56E Ch. 15.10 - Prob. 57E Ch. 15.10 - Prob. 58E Ch. 15.10 - Refer to Exercise 11.4. Regard both book and...Ch. 15.10 - Prob. 60E Ch. 15 - Prob. 62SE Ch. 15 - Prob. 63SE Ch. 15 - Prob. 64SE Ch. 15 - Prob. 65SE Ch. 15 - Prob. 67SE Ch. 15 - Prob. 69SE Ch. 15 - Prob. 70SE Ch. 15 - Prob. 71SE Ch. 15 - Prob. 72SE Ch. 15 - Prob. 74SE Ch. 15 - Prob. 75SE Ch. 15 - Prob. 76SE Ch. 15 - Prob. 77SE Ch. 15 - Prob. 78SE

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Solution Summary: The author concludes that there is no evidence to indicate a significant difference between the tastes of A and B.

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Chapter 15 Solutions