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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

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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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
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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