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The following frequency distribution shows the time (in minutes) that a sample of students uses the ...

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The following frequency distribution shows the time (in minutes) that a sample of students uses the ...

The following frequency distribution shows the time (in minutes) that a sample of students uses the computer terminals per day.

Time	Frequency
20 - 39	2
40 - 59	4
60 - 79	6
80 - 99	4
100 - 119	2

a.	Compute the mean.
b.	Compute the variance.
c.	Compute the standard deviation.
d.	Compute the coefficient of variation.

Textbook

Essentials of Statistics for Business and Economics

Edition: 7^th

Authors: Anderson, Sweeney, Williams, Camm, Cochran

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