NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span of 16 hours with a standard deviation of 0.7 hours. Your statistics class questions this claim. As a class, you randomly select 30 batteries and find that the sample mean life span is 15.6 hours. If the process is working properly what is the probability of getting a random sample of 30 batteries in which the sample mean lifetime is 15.6 hours or less? Is the company’s claim reasonable? ( round your probability to four decimal places.)   The companies claim _________ reasonable because the probability that a sample of 30 batteries would have a lifetime of at most 15.6 hours is about_______. the companies claim is/is not?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span of 16 hours with a standard deviation of 0.7 hours. Your statistics class questions this claim. As a class, you randomly select 30 batteries and find that the sample mean life span is 15.6 hours. If the process is working properly what is the probability of getting a random sample of 30 batteries in which the sample mean lifetime is 15.6 hours or less? Is the company’s claim reasonable? ( round your probability to four decimal places.)

 

The companies claim _________ reasonable because the probability that a sample of 30 batteries would have a lifetime of at most 15.6 hours is about_______.

the companies claim is/is not? 

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