Help 7
50, 46, 54, 51, 29, 52, 48, 54, 47, 48
Mean = 47.9
Std Dev = 6.8
So....1 std dev from the mean lies between
47.9 - 6.8 and 47.9 + 6.8 =
41.1 and 54.7
There are 9 scores falling within this range = 90% of the data
We expect 68%
So...."D" is correct
