The lifetimes of a certain electronic component are known to be normally distributed with a mean of 1,600 hours and a standard deviation of 400 hours. a. For a random sample of 16 components, find the probability that the sample mean is more than 1,500 hours. b. For a random sample of 16 components, the probability is 0.15 that the sample mean lifetime is more than how many hours? c. For a random sample of 16 components, the probability is 0.10 that the sample standard deviation lifetime is more than how many hours?
The lifetimes of a certain electronic component are known to be normally distributed with a mean of 1,600 hours and a standard deviation of 400 hours. a. For a random sample of 16 components, find the probability that the sample mean is more than 1,500 hours. b. For a random sample of 16 components, the probability is 0.15 that the sample mean lifetime is more than how many hours? c. For a random sample of 16 components, the probability is 0.10 that the sample standard deviation lifetime is more than how many hours?
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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The lifetimes of a certain electronic component are known to be
a. For a random sample of 16 components, find the
b. For a random sample of 16 components, the probability is 0.15 that the sample mean lifetime is more than how many hours?
c. For a random sample of 16 components, the probability is 0.10 that the sample standard deviation lifetime is more than how many hours?
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