"An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equal to 812 hours and a standard deviation of 59 hours. Find the probability that a random samples of 39 bulbs will have an average life of greater than 821 hours." 0.1711 0.8289 0.5832 0.4168

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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"An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equal to
812 hours and a standard deviation of 59 hours. Find the probability that a random samples of 39 bulbs will have an average life of
greater than 821 hours."
0.1711
0.8289
0.5832
0.4168
Transcribed Image Text:"An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equal to 812 hours and a standard deviation of 59 hours. Find the probability that a random samples of 39 bulbs will have an average life of greater than 821 hours." 0.1711 0.8289 0.5832 0.4168
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