According to a 2009 Reader's Digest article, people throw away approximately 11% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 111 grocery shoppers to investigate their behavior. What is the probability that the sample proportion exceeds 0.08? Note: You should carefully round any intermediate values you calculate to 4 decimal places to match wamap's approach and calculations. Answer =  (Enter your answer as a number accurate to 4 decimal places.)    A manufacturer knows that their items have a normally distributed length, with a mean of 14.9 inches, and standard deviation of 3.1 inches. If 13 items are chosen at random, what is the probability that their mean length is less than 13.6 inches?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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According to a 2009 Reader's Digest article, people throw away approximately 11% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 111 grocery shoppers to investigate their behavior. What is the probability that the sample proportion exceeds 0.08?

Note: You should carefully round any intermediate values you calculate to 4 decimal places to match wamap's approach and calculations.

Answer =  (Enter your answer as a number accurate to 4 decimal places.) 

 

A manufacturer knows that their items have a normally distributed length, with a mean of 14.9 inches, and standard deviation of 3.1 inches.

If 13 items are chosen at random, what is the probability that their mean length is less than 13.6 inches?

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