distributed with a mean of 1,700 hours and a standard deviation of 400 hours. A random sample of 64 of these light bulbs is taken. The probability is 0.15 that the sample mean lifetime is more than how many hours?   Question 3 options:   1)  1725   2)  1670   3)  1652   4)  1752

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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The lifetimes of a certain brand of light bulbs are known to be normally distributed with a mean of 1,700 hours and a standard deviation of 400 hours. A random sample of 64 of these light bulbs is taken. The probability is 0.15 that the sample mean lifetime is more than how many hours?
 

Question 3 options:

 

1) 

1725

 

2) 

1670
 

3) 

1652
 

4) 

1752
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