Question

if a score is 72% and the stdev is 4%, and the mean is 62% .. Then I think we are about
4+4+2 = 2.5 std deviations above the mean.
IS this considered.. above average or Well above average?

Answer 1

so, do you know the 68, 95, 99 rule?

Answer 2

99.7**

Answer 3

yes I know these thanks.. empirical rule..
I know that its' a zscore of 2.5 and it's between 95 and 99 .. but I dont know if this would be considered just "above average, " or "well above average"
those were the questions I was being asked.

Answer 4

Well, the reason I was asking is if it is due to being 2.5 std dev away, it falls in the 99.7 right?

Answer 5

so, it must be well above average to be in that category.

Answer 6

right ..well within, but below.. midway I guess..
Is above 99% considered well above ?
personally that would be my measure.. and below 99 is just above average..
I prefer to be above 99 as much as possible.
But that's how I operate.. so I dont know.. Im as anal as hell about this kind of thing.
I just wondered if there was a standard defintion within statistics that defines the bounds of 'average'

Answer 7

average is usually within the first standard deviation

Answer 8

ah cool.. okay.. that's good

Answer 9

so for grades, within 1 std.dev of mean would be C 2, would be Bs, and 3 would be As

Answer 10

let me find a good reference

Answer 11

okay.. so
within 1 std dev <68% average
within 2 std dev <95% above
within 3 std dev <99.7 well above
within 4 std dev <99.9 NERD!

Answer 12

haha, yea, that's how IQ scales work https://en.wikipedia.org/wiki/IQ_classification

Answer 13

your'e awesome! Thanks..

Answer 14

they call it upper extreme instead of nerd though haha

Answer 15

and np

Answer 16

heheh