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Managers at an automobile manufacturing plant would like to examine the mean completion time, μ, of an assembly line operation. The past data indicate that the mean completion time is 42 minutes, but the managers have good reason to believe that this value has increased. The managers plan to perform a statistical test. After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 45 minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of 6 minutes. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H₁ that should be used for the test? Ho : ☐ H₁ : ☐ μ □<口 1x ☑ □□ ローロ □<ロ □≠□

Managers at an automobile manufacturing plant would like to examine the mean completion time, μ, of an assembly line operation. The past data indicate that the mean completion time is 42 minutes, but the managers have good reason to believe that this value has increased. The managers plan to perform a statistical test. After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 45 minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of 6 minutes. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H₁ that should be used for the test? Ho : ☐ H₁ : ☐ μ □<口 1x ☑ □□ ローロ □<ロ □≠□

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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Managers at an automobile manufacturing plant would like to examine the mean completion time, μ, of an assembly line operation. The past data indicate that the mean completion time is 42 minutes, but the managers have good reason to believe that this value has increased. The managers plan to perform a statistical test. After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 45 minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of 6 minutes. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H₁ that should be used for the test? Ho : ☐ H₁ : ☐ μ □<口 1x ☑ □□ ローロ □<ロ □≠□
Transcribed Image Text:Managers at an automobile manufacturing plant would like to examine the mean completion time, μ, of an assembly line operation. The past data indicate that the mean completion time is 42 minutes, but the managers have good reason to believe that this value has increased. The managers plan to perform a statistical test. After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 45 minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of 6 minutes. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H₁ that should be used for the test? Ho : ☐ H₁ : ☐ μ □<口 1x ☑ □□ ローロ □<ロ □≠□
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