(upload your solution) The lives of Globewrite light bulbs made by Glowbuff Inc. have a mean of 1000 hours and standard deviation 160 hours. Assuming a normal distribution for the sample means, find the probability that 36 light bulbs will have a mean life of a. less than 940 hours? b. at least 1020 hours? c. in between 982 and 1030 hours?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 3CYU
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The lives of Globewrite light bulbs made by Glowbuff Inc. have a mean of 1000 hours
and standard deviation 160 hours. Assuming a normal distribution for the sample
means, find the probability that 36 light bulbs will have a mean life of
a. less than 940 hours?
b. at least 1020 hours?
c. in between 982 and 1030 hours?
Use the editor to format your answer
Transcribed Image Text:(upload your solution) The lives of Globewrite light bulbs made by Glowbuff Inc. have a mean of 1000 hours and standard deviation 160 hours. Assuming a normal distribution for the sample means, find the probability that 36 light bulbs will have a mean life of a. less than 940 hours? b. at least 1020 hours? c. in between 982 and 1030 hours? Use the editor to format your answer
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