15. Which of the following statements is TRUE about the standard deviation of a discrete random variable? a. It shows the spread out or dispersion of discrete random variables. b. It is obtained by multiplying the x values and their corresponding probability c. It deals with the average or center of location of the probability distribution. d. It is the summation of the product of the square of the difference of x and its probability. 16. Which term displays the variability or the dispersions of the random variables. Probability Value a. c. Expected Value b. Mean Value d. Variance Refer to the given table in answering numbers 17-20 X 0 1 P(X) 1 1 4 2 2/3 17-18. What is P (X≤ 2)? a. 1 b. 3/4 c. ½ d. 1/4 19-20. What is P(X21)? a. 1 b. ¾ c. ½ d. 1/4 For items 21-24, refer to the scenario and table provided below The number of qualified voters living in the household on a randomly selected Subdivision block is described by the following probability distribution. Number of qualified voter/s, x 1 2 3 4 Probability, P(X) 0.25 0.50 0.15 0.10 21. What is the mean of the probability distribution? a. 1.0 c. 1.8 b. 2.0 d. 2.1. 22-23. What is the variance of the probability distribution? ( a. 0.99 c. 0.89 b. 0.79 d. 0.80 24. What is the standard deviation of the probability distribution? a. 0.89 c. 0.88 b. 0.50 d. 0.62 2114
15. Which of the following statements is TRUE about the standard deviation of a discrete random variable? a. It shows the spread out or dispersion of discrete random variables. b. It is obtained by multiplying the x values and their corresponding probability c. It deals with the average or center of location of the probability distribution. d. It is the summation of the product of the square of the difference of x and its probability. 16. Which term displays the variability or the dispersions of the random variables. Probability Value a. c. Expected Value b. Mean Value d. Variance Refer to the given table in answering numbers 17-20 X 0 1 P(X) 1 1 4 2 2/3 17-18. What is P (X≤ 2)? a. 1 b. 3/4 c. ½ d. 1/4 19-20. What is P(X21)? a. 1 b. ¾ c. ½ d. 1/4 For items 21-24, refer to the scenario and table provided below The number of qualified voters living in the household on a randomly selected Subdivision block is described by the following probability distribution. Number of qualified voter/s, x 1 2 3 4 Probability, P(X) 0.25 0.50 0.15 0.10 21. What is the mean of the probability distribution? a. 1.0 c. 1.8 b. 2.0 d. 2.1. 22-23. What is the variance of the probability distribution? ( a. 0.99 c. 0.89 b. 0.79 d. 0.80 24. What is the standard deviation of the probability distribution? a. 0.89 c. 0.88 b. 0.50 d. 0.62 2114
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Please answer 15-24
Transcribed Image Text:15. Which of the following statements is TRUE about the standard deviation of a discrete random
variable?
a. It shows the spread out or dispersion of discrete random variables.
b. It is obtained by multiplying the x values and their corresponding probability
c. It deals with the average or center of location of the probability distribution.
d. It is the summation of the product of the square of the difference of x and its probability.
16. Which term displays the variability or the dispersions of the random variables.
Probability Value
a.
c. Expected Value
b. Mean Value
d. Variance
Refer to the given table in answering numbers 17-20
X
0
1
2
P(X)
1
1
1
4
2
4
2/3
17-18. What is P (X≤ 2)?
a. 1
b. 3/4
c. ½
d. 1/4
19-20. What is P(X21)?
a. 1
b. ¾
c. ½
d. 1/4
For items 21-24, refer to the scenario and table provided below
The number of qualified voters living in the household on a randomly selected Subdivision block is
described by the following probability distribution.
1
2
3
4
Number of qualified voter/s, x
Probability, P(X)
0.25
0.50
0.15
0.10
21. What is the mean of the probability distribution?
a.
1.0
c. 1.8
b. 2.0
d. 2.1.
22-23. What is the variance of the probability distribution? C
a. 0.99
c. 0.89
b. 0.79
d. 0.80
24. What is the standard deviation of the probability distribution?
a. 0.89
c. 0.88
b. 0.50
d. 0.62
2
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