A manufacturing company that produces light bulb found out that the mean life span of the bulb is 1000 hours with a standard deviation of 80 hours. What percent of these light bulbs will last at least 750 hours? a. 99.91% b. 99.99% c. 99.95% d. 99.92%
A manufacturing company that produces light bulb found out that the mean life span of the bulb is 1000 hours with a standard deviation of 80 hours. What percent of these light bulbs will last at least 750 hours? a. 99.91% b. 99.99% c. 99.95% d. 99.92%
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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A manufacturing company that produces light bulb found out that the mean life span of the bulb is 1000 hours with a standard deviation of 80 hours. What percent of these light bulbs will last at least 750 hours?
a. 99.91%
b. 99.99%
c. 99.95%
d. 99.92%
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