In a bell-shaped data set, the percentage of values that is within plus/minus two standard deviations of the mean value is about
A. |
50% |
|
B. |
70% |
|
C. |
85% |
|
D. |
95% |
|
E. |
I do not know |
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In a bell-shaped data set, the percentage of values that is within plus/minus two standard deviations...
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