STATS:DATA+MODELS-W/DVD
STATS:DATA+MODELS-W/DVD
4th Edition
ISBN: 9780321986498
Author: DeVeaux
Publisher: PEARSON
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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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Chapter 18, Problem 4E

a.

To determine

Interpret the interval in context.

b.

To determine

Explain the meaning of “95% confident” in this context.

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Chapter 18 Solutions

STATS:DATA+MODELS-W/DVD

Ch. 18.1 - Prob. 1JCCh. 18.1 - Prob. 2JCCh. 18.1 - Prob. 3JCCh. 18.1 - Prob. 4JCCh. 18.1 - Prob. 5JCCh. 18.3 - Prob. 6JCCh. 18.3 - Prob. 7JCCh. 18.3 - Think some more about the 95% confidence interval...Ch. 18 - Prob. 5ECh. 18 - Prob. 37E
Ch. 18 - 20. Hiring In preparing a report on the economy,...Ch. 18 - Prob. 9ECh. 18 - Prob. 10ECh. 18 - Prob. 11ECh. 18 - 24. More conditions Consider each situation...Ch. 18 - Prob. 13ECh. 18 - 26. More conclusions In January 2002, two students...Ch. 18 - Prob. 15ECh. 18 - 28. Confidence intervals, again Several factors...Ch. 18 - Prob. 17ECh. 18 - Prob. 18ECh. 18 - 31. Mislabeled seafood In 2013 the environmental...Ch. 18 - Prob. 20ECh. 18 - Prob. 21ECh. 18 - Prob. 22ECh. 18 - Prob. 23ECh. 18 - 36. Take the offer First USA, a major credit card...Ch. 18 - Prob. 25ECh. 18 - 38. Junk mail Direct mail advertisers send...Ch. 18 - Prob. 27ECh. 18 - 40. Local news The mayor of a small city has...Ch. 18 - Prob. 29ECh. 18 - 42. Gambling A city ballot includes a local...Ch. 18 - Prob. 31ECh. 18 - 44. Teachers A 2011 Gallup poll found that 76% of...Ch. 18 - Prob. 33ECh. 18 - Prob. 34ECh. 18 - Prob. 35ECh. 18 - 48. Back to campus II Suppose ACT, Inc. wants to...Ch. 18 - Prob. 39ECh. 18 - Prob. 40ECh. 18 - Prob. 41ECh. 18 - Prob. 42ECh. 18 - Prob. 43ECh. 18 - Prob. 44ECh. 18 - Prob. 1ECh. 18 - Prob. 2ECh. 18 - Prob. 3ECh. 18 - Prob. 4ECh. 18 - Prob. 6ECh. 18 - Prob. 7ECh. 18 - Prob. 8E
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