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A manufacturer claims that the mean lifetime of its fluorescent bulbs hours. A homeowner selects 40 bulbs and finds the mean lifetime to hours with a population standard deviation of 80 hours. Test the man claim. Use a = 0.05. (a) State the Null and Alternative Hypothesis for this test. (b) Draw the critical region sketch using the 5% level of significance.

A manufacturer claims that the mean lifetime of its fluorescent bulbs hours. A homeowner selects 40 bulbs and finds the mean lifetime to hours with a population standard deviation of 80 hours. Test the man claim. Use a = 0.05. (a) State the Null and Alternative Hypothesis for this test. (b) Draw the critical region sketch using the 5% level of significance.

MATLAB: An Introduction with Applications
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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A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner selects 40 bulbs and finds the mean lifetime to be 990 hours with a population standard deviation of 80 hours. Test the manufacturer's claim. Use a = 0.05. (a) State the Null and Alternative Hypothesis for this test. (b) Draw the critical region sketch using the 5% level of significance. (c) Calculate the test statistic. (d) Make a decision concerning the null hypothesis. (e) Write a conclusion concerning the claim.
Transcribed Image Text:A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner selects 40 bulbs and finds the mean lifetime to be 990 hours with a population standard deviation of 80 hours. Test the manufacturer's claim. Use a = 0.05. (a) State the Null and Alternative Hypothesis for this test. (b) Draw the critical region sketch using the 5% level of significance. (c) Calculate the test statistic. (d) Make a decision concerning the null hypothesis. (e) Write a conclusion concerning the claim.
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