**Empirical Rule Calculator with Easy Step-by-Step Solution ...**
http://statisticshelper.com/empirical-rule-calculator-mean-standard-deviation

The Empirical Rule is broken down into three percentages, 68, 95, and 99.7. Hence, it’s sometimes called the 68 95 and 99.7 rule. The first part of the rule states: 68% of the data values in a normal, bell-shaped, distribution will lie within 1 standard deviation (within 1 sigma) of …

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