An electric firm manufacture light bulb that have a length of life that is approximately normally distributed with mean equal to 800 hours and a standard deviation of 40 hours. Find the probability that a random samples of 16 bulbs will have an average life of less than 775 hours? A.) 0.1052 B.) 0.0052 C.) 0.1062 D.) 0.0062
An electric firm manufacture light bulb that have a length of life that is approximately normally distributed with mean equal to 800 hours and a standard deviation of 40 hours. Find the probability that a random samples of 16 bulbs will have an average life of less than 775 hours? A.) 0.1052 B.) 0.0052 C.) 0.1062 D.) 0.0062
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:An electric firm manufacture light bulb that
have a length of life that is approximately
normally distributed with mean equal to 800
hours and a standard deviation of 40 hours.
Find the probability that a random samples of
16 bulbs will have an average life of less than
775 hours?
A.) 0.1052 B.) 0.0052 C.) 0.1062 D.) 0.0062
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