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21 July, 20:53

Find the range of values that represent the middle 99.7% of distribution

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  1. 21 July, 23:42
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    The middle 99.7 % of data in a normal distribution is the range from µ - 3σ to µ + 3σ. The standard deviation is 55, so 3σ = 3 ∙ 55 or 165. Therefore, the range of values in the middle 99.7 % is 251 < X < 581.
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