The distribution of scores on a standardized aptitude test is approximately normal with a mean of 490 and a standard deviation of 95. What is the minimum score needed to be in the top 20% on this test? Carry your intermediate computations to at least four decimal places, and round your answer to the nearest integer.
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Given that the area to the right of the z-score is 0.2, we need to find the z-score that corresponds to a cumulative probability of 0.8. Show more…
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The distribution of scores on a standardized aptitude test is approximately normal with a mean of 520 and a standard deviation of 95. What is the minimum score needed to be in the top 20% on this test? Carry your intermediate computations to at least four decimal places, and round your answer to the nearest integer
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'The distribution of scores on a standardized aptitude test is approximately normal with a mean of 480 and a standard deviation of 95 What is the minimum score needed to be in the top 25% on this test? Carry your intermediate computations to at least four decimal places, and round your answer to the nearest integer.'
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