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A certain stock market had a mean return of 3.4% in a recent year. Assume that the returns for stocks on the market were distributed normally, with a mean of 3.4 and a standard deviation of 10. Complete parts (a) through (g) below. a. If you select an individual stock from this population, what is the probability that it would have a percentage return less than 0 (that is, a loss)? . (Round to four decimal places as needed.) b. If you select an individual stock from this population, what is the probability that it would have a percentage return between negative 12 and negative 20? (Round to four decimal places as needed.) c. If you select an individual stock from this population, what is the probability that it would have a percentage return greater than negative 3? (Round to four decimal places as needed.) d. If you select a random sample of four stocks from this population, what is the probability that the sample would have a mean percentage return less than 0 (a loss)? e. If you select a random sample of four stocks from this population, what is the probability that the sample would have a mean percentage return between −12 and −20? f. If you select a random sample of four stocks from this population, what is the probability that the sample would have a mean percentage return greater than −3?
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