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Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally distributed, with a mean life of 1200 hr and a standard deviation of 50 hr. The number of light bulbs that will last between 1130 hr and 1260 hr is (Round to the nearest whole number.) If 30,000 of these bulbs are produced, how many will last between 1130 hr and 1260 hr?

Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally distributed, with a mean life of 1200 hr and a standard deviation of 50 hr. The number of light bulbs that will last between 1130 hr and 1260 hr is (Round to the nearest whole number.) If 30,000 of these bulbs are produced, how many will last between 1130 hr and 1260 hr?

MATLAB: An Introduction with Applications
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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Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally distributed, with a mean life of 1200 hr and a standard deviation of 50 hr. The number of light bulbs that will last between 1130 hr and 1260 hr is (Round to the nearest whole number.) If 30,000 of these bulbs are produced, how many will last between 1130 hr and 1260 hr?
Transcribed Image Text:Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally distributed, with a mean life of 1200 hr and a standard deviation of 50 hr. The number of light bulbs that will last between 1130 hr and 1260 hr is (Round to the nearest whole number.) If 30,000 of these bulbs are produced, how many will last between 1130 hr and 1260 hr?
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