Question

help please...

what they mean "more than one standard deviation"?


22, 10, 7, 5, 12, 1, 11, 24, 5, 10, 12, 5, 17, 13, 12, 8, 6, 16, 21, 3



How many people consume more than one standard deviation above the average quantity of pizza?

Answer 1

I'm way too tired to type out an explanation of this so just read this:
http://en.wikipedia.org/wiki/Standard_deviation#Basic_examples
and follow the prescribed steps. Basically, find the average value, subtract that from each value and square the result, then take the square root of the average of that number. That's your standard of deviation. Then, just find out which elements of your list are further away from the average of the list ± your standard of deviation and write those down.

Answer 2

What do these represent: 22, 10, 7, 5, 12, 1, 11, 24, 5, 10, 12, 5, 17, 13, 12, 8, 6, 16, 21, 3
@uh_oh_boy23