dealing with the life expectancy of light bulbs whose lifetimes are normally distributed with a mean life of 750 hours and with a standard deviation of 80 hours. Show or explain how you determine the appropriate z-score and related percentage. What percent of light bulbs will last longer than 870 hours? What percent of light bulbs will last between 730 hours and 850 hours?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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dealing with the life expectancy of light bulbs whose lifetimes are normally distributed with a mean life of 750 hours and with a standard deviation of 80 hours. Show or explain how you determine the appropriate z-score and related percentage.

  1. What percent of light bulbs will last longer than 870 hours?

What percent of light bulbs will last between 730 hours and 850 hours?

 

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