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
icon
Related questions
Question

Q15. PLESE ONLY ANSWER QUESTION "D,E, and F"

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. O.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?
P(x > 10) =
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?
Р\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 =
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. O.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? P(x > 10) = 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? Р\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 =
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman