A manufacturer of 8-watt LED downlights has past data that shows the lifespan of the downlight is normally distributed with mean 50,000 hours and standard deviation 5,000 hours. Let ? be the lifespan of a random selected LED 8-watt downlight from this manufacturer. g. A random sample of twenty-five 8-watt LED downlights produced by this manufacturer is selected. State the type of distribution and the value/s of the parameter/s for the mean of this sample. h. Calculate the probability that the average lifespan of this sample is less than 47,500 hours.
A manufacturer of 8-watt LED downlights has past data that shows the lifespan of the downlight is normally distributed with mean 50,000 hours and standard deviation 5,000 hours. Let ? be the lifespan of a random selected LED 8-watt downlight from this manufacturer. g. A random sample of twenty-five 8-watt LED downlights produced by this manufacturer is selected. State the type of distribution and the value/s of the parameter/s for the mean of this sample. h. Calculate the probability that the average lifespan of this sample is less than 47,500 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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A manufacturer of 8-watt LED downlights has past data that shows the lifespan of the
downlight is
Let ? be the lifespan of a random selected LED 8-watt downlight from this manufacturer.
g. A random sample of twenty-five 8-watt LED downlights produced by this manufacturer is selected. State the type of distribution and the value/s of the parameter/s for the mean of this sample.
h. Calculate the probability that the average lifespan of this sample is less than 47,500 hours.
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