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MATLAB: An Introduction with Applications
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ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Step 2 of 3:
Compute the value of the test statistic. Round your answer to three decimal places.
Step 3 of 3:
Draw a conclusion and interpret the decision.
![It currently takes users a mean of 9 minutes to install the most popular computer program made by RodeTech, a software design
company. After changes have been made to the program, the company executives want to know if the new mean is now different
from 9 minutes so that they can change their advertising accordingly. A simple random sample of 71 new customers are asked to
time how long it takes for them to install the software. The sample mean is 9.3 minutes with a standard deviation of 1.2 minutes.
Perform a hypothesis test at the 0.05 level of significance to see if the mean installation time has changed.
Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places.
Answer
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Transcribed Image Text:It currently takes users a mean of 9 minutes to install the most popular computer program made by RodeTech, a software design
company. After changes have been made to the program, the company executives want to know if the new mean is now different
from 9 minutes so that they can change their advertising accordingly. A simple random sample of 71 new customers are asked to
time how long it takes for them to install the software. The sample mean is 9.3 minutes with a standard deviation of 1.2 minutes.
Perform a hypothesis test at the 0.05 level of significance to see if the mean installation time has changed.
Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places.
Answer
E Tables
Keypad
Keyboard Shortcuts
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