Lemma
EasyNormal distribution
OpenStax, Statistics §6.2 Using the Normal Distribution · Example 4 · Statistics · Normal distribution

Using the Normal Distribution · Example 4

d. Find the 70^th percentile, —that is, find the score k such that 70 percent of scores are below k and 30 percent of the scores are above k.

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OpenStax, Statistics · §6.2 Using the Normal Distribution · Example 4

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