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supp problems, Question 5.39 Your answer is partially correct. Try again. In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was determined that 20% of all stock investors are retired people. In addition, 40% of all adults invest in mutual funds. Suppose a random sample of 25 stock investors is taken. *Round your answer to 3 decimal places. Arrendix A Statistical Tables a. What is the probability that exactly six are retired people? P(x = 6) - 0.163 b. What is the probability that 9 or more are retired people? P(x 2 9) = 0.047 C. How many retired people would you expect to find in a random sample of 25 stock investors? 5 Expected Value CALL TU occurrureri 0.180 P(x 8) e. Suppose a random sample of 20 adults is taken. What is the probability that ferler than six adults invested in mutual funds? Pex