Expected value d. Suppose a random sample of 20 adults is taken. What is the probability that exactly six adults invested in mutual funds? P(x = 6) = e. Suppose a random sample of 20 adults is taken. What is the probability that fewer than six adults invested in mutual funds? P(x < 6) = f. Suppose a random sample of 20 adults is taken. What is the probability that exactly two adults invested in mutual funds? P(x = 2) =
Expected value d. Suppose a random sample of 20 adults is taken. What is the probability that exactly six adults invested in mutual funds? P(x = 6) = e. Suppose a random sample of 20 adults is taken. What is the probability that fewer than six adults invested in mutual funds? P(x < 6) = f. Suppose a random sample of 20 adults is taken. What is the probability that exactly two adults invested in mutual funds? P(x = 2) =
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Q15. PLESE ONLY ANSWER QUESTION "G, and H"
Transcribed Image Text: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, e.g. 0.758.
Appendix A Statistical Tables
a. What is the probability that exactly seven are retired people?
P(x = 7) =
b. What is the probability that 10 or more are retired people?
Р(x2 10) 3D
c. How many retired people would you expect to find in a random sample of 25 stock investors?
Expected Value =
d. Suppose a random sample of 20 adults is taken. What is the probability that exactly six adults invested in mutual funds?
P(x = 6) =
e. Suppose a random sample of 20 adults is taken. What is the probability that fewer than six adults invested in mutual funds?
P(x < 6) =
f. Suppose a random sample of 20 adults is taken. What is the probability that exactly two adults invested in mutual funds?
P(x = 2) =
g. Suppose a random sample of 20 adults is taken. What is the probability that 11 or more adults invested in mutual funds?
P(x> 11) =
h. For parts e-g, what exact number of adults would produce the highest probability? How does this compare to the expected number?
X =
Expected Number = µ =
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