a) What is the probability that a randomly chosen light bulb lasts more than 10,500 hours? Round your answer to 4 decimal places. b) Describe the distribution of the mean lifespan of 15 light bulbs. Do not round your answer for the mean. For the standard deviation, round your answer to 4 decimal places. Mean: grams Standard Deviation: grams c) What is the probability that the mean lifespan of 15 randomly chosen light bulbs is more than 10,500 hours? Round your answer to 2 decimal places.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Question
A manufacturer of compact fluorescent light bulbs advertises that the distribution of the lifespans of these
light bulbs is nearly normal with a mean of 9,000 hours and a standard deviation of 1,000 hours.
a) What is the probability that a randomly chosen light bulb lasts more than 10,500 hours? Round your answer
to 4 decimal places.
b) Describe the distribution of the mean lifespan of 15 light bulbs. Do not round your answer for the mean. For
the standard deviation, round your answer to 4 decimal places.
Mean:
grams
Standard Deviation:
grams
c) What is the probability that the mean lifespan of 15 randomly chosen light bulbs is more than 10,500 hours?
Round your answer to 2 decimal places.
Transcribed Image Text:A manufacturer of compact fluorescent light bulbs advertises that the distribution of the lifespans of these light bulbs is nearly normal with a mean of 9,000 hours and a standard deviation of 1,000 hours. a) What is the probability that a randomly chosen light bulb lasts more than 10,500 hours? Round your answer to 4 decimal places. b) Describe the distribution of the mean lifespan of 15 light bulbs. Do not round your answer for the mean. For the standard deviation, round your answer to 4 decimal places. Mean: grams Standard Deviation: grams c) What is the probability that the mean lifespan of 15 randomly chosen light bulbs is more than 10,500 hours? Round your answer to 2 decimal places.
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