Posted by **James** on Wednesday, June 27, 2012 at 2:13pm.

In a statistic class, 10 scores were randomly selected with the following results were obtained: 74, 73, 87, 57, 71, 68, 65, 77, 67, 66. What are the inner fences? What is the coefficient of variation?

- statistics -
**MathGuru**, Thursday, June 28, 2012 at 3:54pm
Find the mean and standard deviation for your data. Once you calculate those two values, you can use the following formula to find the coefficient of variation:

CV = (sd/mean) * 100

...where sd = standard deviation and * means to multiply.

I hope this will help.

- statistics -
**MathGuru**, Thursday, June 28, 2012 at 3:56pm
Note: CV is the standard deviation expressed as a percentage of the mean.

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