In a normal distribution, what z-score cuts off the top 90% of the distribution? Group of answer choices A) z = +1.28 B) z = -1.28 C) z = -0.58 D) z = +0.58
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The question asks for the z-score that cuts off the top 90% of a normal distribution. This means we are looking for the z-score where 90% of the data values lie above it, or equivalently, 10% of the data values lie below it. Show more…
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