question/0 Update : b-day invitation O spy stuff O Surveillance Gear. T Thesaurus 1 QuillBot DEL BeachBoard M McGraw Hill Conn. M NutritionCalc Plus E Reading List + Copy of Ch 5: Homework Question 1 of 6 -/2 In a study by Peter D. Hart Research Associates for the Nasdag Stock Market, it was determined that 20% of all stock investors are retired people. In addition, 40% of all U.S. adults invest in mutual funds, Suppose a random sample of 25 stock investors is taken. a. What is the probability that exactly seven are retired people? b. What is the probability that 9 or more are retired people? c. How many retired people would you expect to find in a random sample of 25 stock investors? d. Suppose a random sample of 20 U.S. adults is taken. What is the probability that exactly seven adults invested in mutual funds? e. Suppose a random sample of 20 U.S. adults is taken. What is the probability that fewer than seven adults invested in mutual funds? f. Suppose a random sample of 20 U.S. adults is taken. What is the probability that exactly two adults invested in mutual funds? g. Suppose a random sample of 20 U.S. adults is taken. What is the probability that 12 or more adults invested in mutual funds? h. For parts e-g. what exact number of adults would produce the highest probability? How does this compare to the expected number? Appendix A Statistical Tables "(Round your answers to 3 decimal places when calculating using Table A.2, e.g. 0.215.) *(Round your answer to 1 decimal places, e.g. 2.1.) ***(Round your answer to O decimal places, e.g. 25.) a. P(x = 7) = b. P(x 2 9) = c. Expected Value = d. P(x = 7) = e. P(x < 7) =

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