Question

Which of the choices is the variance of the sample shown here? 35,37,42,57,61,70

Answer 1

205.5

Explanation:

Answer 2

First, you need to find the mean of all this set of numbers. You would add them all together and then divide by 6 which is 50.5.

Now you find the sample variance. Subtract each number from the mean.

15.5, 13.5, 8.5, -6.5, -10.5, -19.5

After, you square each value and add them.

240.25+182.25+72.25+42.25+110.25+380.2...
= 1027.5

Now divide by 5 (because it's a sample variance) and you get 205.5.