IV. EXERCISES An electrical company claims that an average life of bulbs it manufactures is 1200 hours with a standard deviation of 250 hours. If a random sample of 100 bulbs is chosen, what is the probability of the sample mean will be: a. Greater than 1150 hours? b. Less than 1250 hours? c. Between 1150 and 1250 hours?
IV. EXERCISES An electrical company claims that an average life of bulbs it manufactures is 1200 hours with a standard deviation of 250 hours. If a random sample of 100 bulbs is chosen, what is the probability of the sample mean will be: a. Greater than 1150 hours? b. Less than 1250 hours? c. Between 1150 and 1250 hours?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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