A manufacturer claims that the mean lifetime, μ , of its light bulbs is 44 months. The standard deviation of these lifetimes is 4 months. Thirty-five bulbs are selected at random, and their mean lifetime is found to be 43 months. Assume that the population is normally distributed. Can we conclude, at the 0.05 level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from 44 months? Perform a two-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table. The null hypothesis: H0: The alternative hypothesis: H1: The type of test statistic: (Choose one)ZtChi squareF The value of the test statistic: (Round to at least three decimal places.) The p-value: (Round to at least three decimal places.) Can we conclude that the mean lifetime of light bulbs made by this manufacturer differs from 44 months? Yes No
A manufacturer claims that the mean lifetime, μ , of its light bulbs is 44 months. The standard deviation of these lifetimes is 4 months. Thirty-five bulbs are selected at random, and their mean lifetime is found to be 43 months. Assume that the population is normally distributed. Can we conclude, at the 0.05 level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from 44 months? Perform a two-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table. The null hypothesis: H0: The alternative hypothesis: H1: The type of test statistic: (Choose one)ZtChi squareF The value of the test statistic: (Round to at least three decimal places.) The p-value: (Round to at least three decimal places.) Can we conclude that the mean lifetime of light bulbs made by this manufacturer differs from 44 months? Yes No
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
A manufacturer claims that the mean lifetime,
, of its light bulbs is
months. The standard deviation of these lifetimes is
months. Thirty-five bulbs are selected at random, and their mean lifetime is found to be
months. Assume that the population is normally distributed. Can we conclude, at the
level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from
months?
μ
44
4
43
0.05
44
Perform a two-tailed test. Then fill in the table below.
Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table.
|
|
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