SOLUTION: The following values represent the number of smartphones sold per day at a local cell phone retail store during the last 10 business days. 13, 8, 10, 12, 19, 10, 13, 12, 6, 16 I

Algebra ->  Probability-and-statistics -> SOLUTION: The following values represent the number of smartphones sold per day at a local cell phone retail store during the last 10 business days. 13, 8, 10, 12, 19, 10, 13, 12, 6, 16 I      Log On


   

Question 1135683: The following values represent the number of smartphones sold per day at a local cell phone retail store during the last 10 business days. 13, 8, 10, 12, 19, 10, 13, 12, 6, 16
I know the range is 13
I am unsure of how to calculate the sample variance and the sample standard deviation. Could you help?
Answer by ikleyn(52847) About Me  (Show Source):
You can put this solution on YOUR website!
.


The sample variance is defined by

    %281%2FN%29%2Asum%28%28x%5Bi%5D-m%29%5E2%2C++i=1%2C++N%29

where m the sample mean and N is the sample size.



Sample standard deviation is

    sqrt%28sum%28%28x%5Bi%5D-m%29%5E2%2C++i=1%2C++N%29%2F%28N-1%29%29.

There are numerous Internet sites allowing online (free of charge) calculations.

For example, this one

https://www.calculator.net/statistics-calculator.html