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Unformatted text preview: c. 4.8 d. 4 4. The following information was collected from a simple random sample of a population. 16 19 18 17 20 18 The sample standard deviation is a. 2.000 b. 1.291 c. 1.414 d. 1.667 Problem 1. Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. a. What is the probability that a randomly selected exam will have a score of at least 71? b. If the top 2.5% of test scores receive merit awards, what is the lowest score eligible for an award? Answers: c a c c 0.9332 91.76...
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- Spring '08