Probability and Statistical Inference (9th Edition)
9th Edition
ISBN: 9780321923271
Author: Robert V. Hogg, Elliot Tanis, Dale Zimmerman
Publisher: PEARSON
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Chapter 8.1, Problem 4E
Let X equal the thickness of spearmint gum manufactured for vending machines. Assume that the distribution of X is
The target thickness is 7.5 hundredths of an inch. We shall test the null hypothesis
(a) Define the test statistic and critical region for an
(b) Calculate the value of the test statistic and state your decision clearly, using the following ii = 10 thicknesses in hundredths of an inch for pieces of gum that were selected randomly from the production line:
7.65 7.60 7.65 7.70 7.55
7.55 7.40 7.40 7.50 7.50
(c) Is
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Chapter 8 Solutions
Probability and Statistical Inference (9th Edition)
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