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.
