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According to the empirical​ rule, in a normal​ distribution, approximately​ ______% of the data lie within plus or minus 1 standard deviation of the​ mean, approximately​ ______% of the data lie within plus or minus 2 standard deviations of the​ mean, and approximately​ ______% of the data lie within plus or minus 3 standard deviations of the mean.

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According to the empirical​ rule, in a normal​ distribution, approximately​ 68 % of the data lie within plus or minus 1 standard deviation of the​ mean, approximately​ 95 % of the data lie within plus or minus 2 standard deviations of the​ mean, and approximately​ 99.7 % of the data lie within plus or minus 3 standard deviations of the mean.

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