Question

Find the range and the standard deviation (correct to two decimal places).
83, 96, 100, 100, 106=divided by 5=97
I did the
(83-97)+(96-97)+(100-97)+(100+97)=106-97)= I know I add than divide by 5 and I can not come up with Standard deviation. Where am I wrong.

Answer 1

The differences SQUARED

Answer 2

then take the square root, then divide by n

Answer 3

http://www.mathsisfun.com/data/standard-deviation-calculator.html

Answer 4

then divide by n
then take the square root

Answer 5

mean = 97 correct
difference and square of difference
-14 196
-1 1
3 9
3 9
9 81

sum of squares = 296
variance = 296/5 = 59.2

square root of variance = standard deviation = 7.69

Answer 6

Good afternoon Damon, I wish to thank you again for me not understanding that much. Thanks so much for the kindness you show, letting me know how it all comes together so I can do it my self. This is greatly appreciated. Have a wonderful day.

Answer 7

I am happy to help. You are welcome :)