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The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLS is equal to 7,504 hours. The population standard deviation is 900 hours. A random sample of 81 light bulbs indicates a sample mean life of 7,254 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,504 hours? b. Compute the p-value and interpret its meaning. c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs. d. Compare the results of (a) and (c). What conclusions do you reach? a. Let u be the population mean. Determine the null hypothesis, Ho, and the alternative hypothesis, H,. Ho: H= 7504 ed: H1: p# 7504 core What is the test statistic? ZSTAT = -2.5 (Round to two decimal places as needed.) What is/are the critical value(s)? stion 1 (Round to two decimal places as needed. Use a comma to separate answers as needed.) estion 5 urse (Bus 20 of Use Priva Help me solve this View an example Get more help- Clear all Check answer

The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLS is equal to 7,504 hours. The population standard deviation is 900 hours. A random sample of 81 light bulbs indicates a sample mean life of 7,254 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,504 hours? b. Compute the p-value and interpret its meaning. c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs. d. Compare the results of (a) and (c). What conclusions do you reach? a. Let u be the population mean. Determine the null hypothesis, Ho, and the alternative hypothesis, H,. Ho: H= 7504 ed: H1: p# 7504 core What is the test statistic? ZSTAT = -2.5 (Round to two decimal places as needed.) What is/are the critical value(s)? stion 1 (Round to two decimal places as needed. Use a comma to separate answers as needed.) estion 5 urse (Bus 20 of Use Priva Help me solve this View an example Get more help- Clear all Check answer

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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The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLS is equal ta 7,504 hours. The population standard deviation is 900 hours. A random sample of 81 light bulbs indicates a sample mean life of 7,254 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,504 hours? b. Compute the p-value and interpret its meaning. c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs. d. Compare the results of (a) and (c). What conclusions do you reach? a. Let u be the population mean. Determine the null hypothesis, Ho, and the alternative hypothesis, H,. Ho: H= 7504 ed: H1: p# 7504 core What is the test statistic? ZSTAT = -2.5 (Round to two decimal places as needed.) What is/are the critical value(s)? stion 1 (Round to two decimal places as needed. Use a comma to separate answers as needed.) estion 5 urse (Bus 20 of Use Priva Help me solve this View an example Get more help - Clear all Check answer
Transcribed Image Text:The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLS is equal ta 7,504 hours. The population standard deviation is 900 hours. A random sample of 81 light bulbs indicates a sample mean life of 7,254 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,504 hours? b. Compute the p-value and interpret its meaning. c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs. d. Compare the results of (a) and (c). What conclusions do you reach? a. Let u be the population mean. Determine the null hypothesis, Ho, and the alternative hypothesis, H,. Ho: H= 7504 ed: H1: p# 7504 core What is the test statistic? ZSTAT = -2.5 (Round to two decimal places as needed.) What is/are the critical value(s)? stion 1 (Round to two decimal places as needed. Use a comma to separate answers as needed.) estion 5 urse (Bus 20 of Use Priva Help me solve this View an example Get more help - Clear all Check answer
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