1. The lifetimes of a certain brand of LED light bulbs are normally distributed with a mean of 53,400 hours and a standard deviation of 2500 hours. A. If the company making these light bulbs claimed that they would last at least 50,000 hours. What proportion of light bulbs would meet the claim and last at least 50,000 hours? B. The company's marketing director wants the claimed figure to be where 98% of these new light bulbs to last longer than the amount claimed by the company's advertising? What number should be claimed so that 98% of the company's new LED light bulbs meet the claim?
1. The lifetimes of a certain brand of LED light bulbs are normally distributed with a mean of 53,400 hours and a standard deviation of 2500 hours. A. If the company making these light bulbs claimed that they would last at least 50,000 hours. What proportion of light bulbs would meet the claim and last at least 50,000 hours? B. The company's marketing director wants the claimed figure to be where 98% of these new light bulbs to last longer than the amount claimed by the company's advertising? What number should be claimed so that 98% of the company's new LED light bulbs meet the claim?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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