Question

The following data are the distances between 20 retail stores and a large distribution center. The distances are in miles. 29; 32; 33; 40; 58; 67; 68; 69; 76; 82; 88; 95; 96; 96; 99; 106; 112; 127; 145; 150 Use a graphing calculator or computer to find the standard deviation and round to the nearest tenth.

Answer 1

Let's use TI-84 Plus calculator to find the standard deviation .

First we need to enter the data in the list.

Click on STAT >>> EDIT >>>1:Edit...

Then enter the given data in the list L1

THen Click on STAT>>>CALC>>>1:1-Var Stats

List: L1

FreqList:   (skip it)

Calculate (Click on calculate)

So we get the following output

From the above output the sample standard deviation = Sx = 35.25605584 = 35.3

and population standard deviation = X = 34.36335257 = 34.4 ( After rounding ).