Hypothetical population distribution of standard scores when
the original scores are normally distributed.
_ = 0, _ = 1
-1 < Z < 0, or 0 < Z < 1
-2 < Z < -1, or 1< Z < 2
-3 < Z < -2, or 2 < Z < 3
13.59 %
34.13%
2.15%
Z > -3, or 3 < Z
0.13%
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