In 2015, the average duration of long-distance telephone calls from a certain town was 9.4 minutes. A telephone company wants to perform a test to determine whether this average duration of long-distance calls has changed. Twenty calls, originating from the town, was Course Name and Code – Course Information. Academic Year 2021/2022, Semester I Page 24 of 37 randomly selected and the mean duration was 10.2 minutes with standard deviation 4.8 minutes. a) Using a 1% level of significance, Complete the following: ii. Determine the critical value(s) of this test.
In 2015, the average duration of long-distance telephone calls from a certain town was 9.4 minutes. A telephone company wants to perform a test to determine whether this average duration of long-distance calls has changed. Twenty calls, originating from the town, was Course Name and Code – Course Information. Academic Year 2021/2022, Semester I Page 24 of 37 randomly selected and the mean duration was 10.2 minutes with standard deviation 4.8 minutes. a) Using a 1% level of significance, Complete the following: ii. Determine the critical value(s) of this test.
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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_____________________________________________________________________________
In 2015, the average duration of long-distance telephone calls from a certain town was 9.4
minutes. A telephone company wants to perform a test to determine whether this average
duration of long-distance calls has changed. Twenty calls, originating from the town, was
Course Name and Code – Course Information. Academic Year 2021/2022, Semester I
Page 24 of 37
randomly selected and the mean duration was 10.2 minutes with standard deviation 4.8
minutes.
a) Using a 1% level of significance, Complete the following:
ii. Determine the critical value(s) of this test.
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