Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows a normal distribution with a mean of 37 hours and a standard deviation of 5.5 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 9 batteries. a. What can you say about the shape of the distribution of the sample mean? Sample (Click to mean select) Normal Uniform Binomial Round answers to four decimal places. b. What proportion of the samples will have a mean useful life of more than 38.5 hours? Probability c. What is the probability that a randomly selected AA battery will have a useful life of at most 36.5 hours?
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows a normal distribution with a mean of 37 hours and a standard deviation of 5.5 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 9 batteries. a. What can you say about the shape of the distribution of the sample mean? Sample (Click to mean select) Normal Uniform Binomial Round answers to four decimal places. b. What proportion of the samples will have a mean useful life of more than 38.5 hours? Probability c. What is the probability that a randomly selected AA battery will have a useful life of at most 36.5 hours?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 7PPS
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