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Mathematics, 23.08.2019 00:30 starreee

According to the empirical rule, if the data form a "bell-shaped curve" (normal distribution), approximately what percent of the observations will be contained within + /- 2 standard deviations from the arithmetic mean. (select the correct answer from the choices below.)a. 99.7b. 95.0c. 75.0d. 68.3

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