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A z-score or 1.0 corresponds to a value one standard deviation from the mean true or false

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2 votes
That's correct!

Perhaps you know the Empirical Rule:
68% of data lies within 1 std of the mean, corresponding to -1
\leqz
\leq1

95% of data lies wtihin 2std dev of the mean, and
99.9% of data lies within 3 std dev of the mean.
User Testalino
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