Coefficient of variation

Calculating the coefficient of variation, which is simply the sample standard deviation divided by the sample mean, using the graphing calculator.
MyMathLab, Triola, Essentials of Statistics, 5th edition. Section 3.3, #21
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[@mianatalya61]

thank you, you helped a lot

[@CryptoyHelps]

there is no cal on my online exam scientific calculator what to do

[@SpencerHamrick]

You can calculate standard deviation by hand. A little surprised any exam would ask to calculate standard deviation by hand but it’s not that difficult. Just time consuming. Find the average. Subtract the average from each data point. Square each of those results. Sum those values. Divide by n-1. Then take the square root. That’s the numerator in this problem.