Suppose that scores on a particular test are normally distributed with a mean of 120 and a standard deviation of 20. What is the minimum score needed to be in the top 5% of the scores on the test? Carry your intermediate computations to at least four decimal places, and round your answer to one decimal place.
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The problem states that the test scores are normally distributed. This means the scores follow a bell-shaped curve characterized by a mean (average) and a standard deviation. The mean given is 120 and the standard deviation is 20. Show more…
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