6. A company produces laptops. Their products have 1 or 2 or 3 USB ports. The proportion of laptops based on the number of USB ports on them is given by the following pmf: p(k) = C (4 – k)³; k = 1, 2,3 (k is the number of USB ports on the laptop) %3D Note: p(1), p(2) and p(3) are the proportion of laptops with one, two and three USB ports, respectively. a. What is the value of the constant C? b. Let the random variable X be the number of USB ports on a randomly selected laptop. What is the mean of X? c. What is the variance of X?

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
6. A company produces laptops. Their products have 1 or 2 or 3 USB ports. The proportion
of laptops based on the number of USB ports on them is given by the following pmf:
p(k) = C (4 – k)³; k = 1, 2,3 (k is the number of USB ports on the laptop)
Note: p(1), p(2) and p(3) are the proportion of laptops with one, two and three USB ports,
respectively.
a. What is the value of the constant C?
b. Let the random variable X be the number of USB ports on a randomly selected laptop.
What is the mean of X?
c. What is the variance of X?
Transcribed Image Text:6. A company produces laptops. Their products have 1 or 2 or 3 USB ports. The proportion of laptops based on the number of USB ports on them is given by the following pmf: p(k) = C (4 – k)³; k = 1, 2,3 (k is the number of USB ports on the laptop) Note: p(1), p(2) and p(3) are the proportion of laptops with one, two and three USB ports, respectively. a. What is the value of the constant C? b. Let the random variable X be the number of USB ports on a randomly selected laptop. What is the mean of X? c. What is the variance of X?
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Similar questions
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