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Question 277:



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First, find the z-score corresponding to 90% of the area of the normal curve using the percentile to z-score calculator (select 1-sided) and you should get 1.2822. So you need to solve an equation to find what score gets you this z-score.

(195 - x)/30 = 1.2822

195-x = 38.46

156.54 = x

So the minimum score would be 157 rounding up to the nearest integer.

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