An electrical appliance made by company A has an average life of 2500 hours, with a standard deviation of 500 hours. Another company B makes this appliance with an average life of 2300 hours, and a standard deviation of 800 hours. We take 300 devices from company A and 200 devices from company B. Calculate the probability that the average life of the sample from company A is 100 hours less than the average life of the sample from company B.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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An electrical appliance made by company A has an average life of 2500 hours, with a
standard deviation of 500 hours. Another company B makes this appliance with an
average life of 2300 hours, and a standard deviation of 800 hours. We take 300 devices
from company A and 200 devices from company B. Calculate the probability that the
average life of the sample from company A is 100 hours less than the average life of the
sample from company B.
O None of the other options
O 0.0582
0.4418
O 0.9418
Transcribed Image Text:An electrical appliance made by company A has an average life of 2500 hours, with a standard deviation of 500 hours. Another company B makes this appliance with an average life of 2300 hours, and a standard deviation of 800 hours. We take 300 devices from company A and 200 devices from company B. Calculate the probability that the average life of the sample from company A is 100 hours less than the average life of the sample from company B. O None of the other options O 0.0582 0.4418 O 0.9418
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