Question 960379: An engineer claims that her new battery will operate continuously for at least 7 minutes longer than the old battery. To test the claim, the company selects a simple random sample of 100 new batteries and 100 old batteries. The old batteries run continuously for 190 minutes with a standard deviation of 25 minutes; the new batteries, 200 minutes with a standard deviation of 35 minutes. Test the engineer's claim that the new batteries run at least 7 minutes longer than the old. Use a 0.05 level of significance.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Question 960379: An engineer claims that her
new battery will operate continuously for at least
7 minutes longer than the old battery. To test the
claim, the company selects a simple random
sample of 100 new batteries and 100 old batteries.
The old batteries run continuously for 190
minutes with a standard deviation of 25 minutes;
the new batteries, 200 minutes with a standard
deviation of 35 minutes. Test the engineer's claim
that the new batteries run at least 7 minutes
longer than the old. Use a 0.05 level of
significance.
Transcribed Image Text:Question 960379: An engineer claims that her new battery will operate continuously for at least 7 minutes longer than the old battery. To test the claim, the company selects a simple random sample of 100 new batteries and 100 old batteries. The old batteries run continuously for 190 minutes with a standard deviation of 25 minutes; the new batteries, 200 minutes with a standard deviation of 35 minutes. Test the engineer's claim that the new batteries run at least 7 minutes longer than the old. Use a 0.05 level of significance.
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