Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Chapter 20, Problem 56E
Third load of wash In Exercise 54, we saw a 98% confidence interval of ( −40, −22) minutes for μTop − μFront, the difference in time it takes top-loading and front-loading washers to do a load of clothes. Explain why you think each of the following statements is true or false:
- a) 98% of top loaders are 22 to 40 minutes faster than front loaders.
- b) If I choose the laundromat’s top loader, there’s a 98% chance that my clothes will be done faster than if I had chosen the front loader.
- c) If I tried more samples of both kinds of washing machines, in about 98% of these samples I’d expect the top loaders to be an average of 22 to 40 minutes faster.
- d) If I tried more samples, I’d expect about 98% of the resulting confidence intervals to include the true difference in
mean cycle time for the two types of washing machines. - e) I’m 98% confident that top loaders wash clothes an average of 22 to 40 minutes faster than front-loading machines.
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Chapter 20 Solutions
Intro Stats
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