plz help ty a study by Pete D. Hart Research Associates for the Nasdaq Stock Mar
ID: 3056202 • Letter: P
Question
plz help ty
a study by Pete D. Hart Research Associates for the Nasdaq Stock Market it as determined that 20% of all stock investors are retired people. In addition, 40% of all U 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 10 or more are retired people? 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 probablity that exactdly elght adults Invested in mutual funds? e. Suppose a randam sample of 20 U.S. adults is taken. What is the probability that fewer than six adultsinvested in mutual funds? f. Suppose a random sample of 20 U.S. adults is taken. What is the probability that none of the 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-o, what exact number of adults would produce the highest probability? How does this compare to the expected number? (Round your answers to 3 decinal places when calculaling using Table A.2.) (Round your answer to 1 decimal places.) CRound your ansver to 0 decimal places.) 0.006 G. Expected Value - a. Px 2 12) -Explanation / Answer
ans
b. P(X > 10) = 0.017
c. 0.2*25 = 5.0
d. 0.180
e. 0.126
we are directed to solve first 4 parts of multi part question
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