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.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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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.
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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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