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0. A manufacturer of a cell battery wants to determine the average lifetime of their brand new cell battery. (a) If he wants the maximum error to be at most 0.234 hours at 99.2% confidence level, what is the ideal sample size that he can take, by assuming that the standard deviation is 2.57 hours? (b) If a random sample of 175 cell batteries is taken, find the maximum error that can occur with 97% confidence level. (By assuming that the standard deviation remains unchanged).

0. A manufacturer of a cell battery wants to determine the average lifetime of their brand new cell battery. (a) If he wants the maximum error to be at most 0.234 hours at 99.2% confidence level, what is the ideal sample size that he can take, by assuming that the standard deviation is 2.57 hours? (b) If a random sample of 175 cell batteries is taken, find the maximum error that can occur with 97% confidence level. (By assuming that the standard deviation remains unchanged).

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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10. A manufacturer of a cell battery wants to determine the average lifetime of their brand new cell battery. (a) If he wants the maximum error to be at most 0.234 hours at 99.2% confidence level, what is the ideal sample size that he can take, by assuming that the standard deviation is 2.57 hours? (b) If a random sample of 175 cell batteries is taken, find the maximum error that can occur with 97% confidence level. (By assuming that the standard deviation remains unchanged).
Transcribed Image Text:10. A manufacturer of a cell battery wants to determine the average lifetime of their brand new cell battery. (a) If he wants the maximum error to be at most 0.234 hours at 99.2% confidence level, what is the ideal sample size that he can take, by assuming that the standard deviation is 2.57 hours? (b) If a random sample of 175 cell batteries is taken, find the maximum error that can occur with 97% confidence level. (By assuming that the standard deviation remains unchanged).
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