An electrical company claims that the average life of the bulbs it manufactures is 1200 hours with standard deviation of 250 hours. If a random sample of 100 bulbs is chosen, what is the probability that the sample mean will be: a. Greater than 1150 hours? b. Less than 1250 hours? c. Between 1100 and 1300 hours?
An electrical company claims that the average life of the bulbs it manufactures is 1200 hours with standard deviation of 250 hours. If a random sample of 100 bulbs is chosen, what is the probability that the sample mean will be: a. Greater than 1150 hours? b. Less than 1250 hours? c. Between 1100 and 1300 hours?
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.4: Discrete Random Variables; Applications To Decision Making
Problem 10E
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