A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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On Wikipedia it said the proportion of people who bite their nails is over 31%. You aren't sure if you can believe Wikipedia, so you randomly sample 209 people and find 83 of them bite their nails. The hypothesis test with α=0.05 had a p-value of 0.0033, which causes you to reject the null, and believe that Wikipedia was right. Assuming the true proportion really was 0.31, if another sample of 209 people was taken, what is the probability of getting a proportion as high as 83/209 or higher?

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