"An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equal to 815 hours and a standard deviation of 90 hours. Find the probability that a random samples of 41 bulbs will have an average life of less than 804 hours." 0.7823 0.2177 0.6103 0.3897
"An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equal to 815 hours and a standard deviation of 90 hours. Find the probability that a random samples of 41 bulbs will have an average life of less than 804 hours." 0.7823 0.2177 0.6103 0.3897
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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Transcribed Image Text:"An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equal to
815 hours and a standard deviation of 90 hours. Find the probability that a random samples of 41 bulbs will have an average life of
less than 804 hours."
0.7823
0.2177
0.6103
0.3897
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