age lifetime of its lightbulbs is equal to 36 months. A random sample of 64 bulbs has a mean lifetime of 32 months, and the sample standard deviation is 11 months. We will be using a z-test for the population mean at x = 0.05 to check the manufacturer's claim. A critical value for this test is: 1.645 1.96 2.31 2.821

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A manufacturer claims that the average lifetime of its lightbulbs is equal to 36
months. A random sample of 64 bulbs has a mean lifetime of 32 months, and the
sample standard deviation is 11 months. We will be using a z-test for the population
mean at x = 0.05 to check the manufacturer's claim.
A critical value for this test is:
1.645
1.96
2.31
2.821
Transcribed Image Text:A manufacturer claims that the average lifetime of its lightbulbs is equal to 36 months. A random sample of 64 bulbs has a mean lifetime of 32 months, and the sample standard deviation is 11 months. We will be using a z-test for the population mean at x = 0.05 to check the manufacturer's claim. A critical value for this test is: 1.645 1.96 2.31 2.821
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