5. After watching a number of children playing games in a video arcade, a statistics practitioner estimated the following probability distribution of X, the number of games per visit. 1 3 4 f(x) 0.05 0.2 0.3 0.25 0.2 (a) What is the probability that a child will play at most three games? (b) What is the mean and variance of the number of games played? (c) Suppose that each game costs $2 to play. Use the laws of expected value and variance to determine the expected value and variance of the revenue (the amount of money) the arcade receives per child.

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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5. After watching a number of children playing games in a video arcade, a
statistics practitioner estimated the following probability distribution of X,
the number of games per visit.
1
3
4
f(x) 0.05 0.2 0.3
0.25 0.2
(a) What is the probability that a child will play at most three games?
(b) What is the mean and variance of the number of games played?
(c) Suppose that each game costs $2 to play. Use the laws of expected
value and variance to determine the expected value and variance of
the revenue (the amount of money) the arcade receives per child.
(d) Determine the probability distribution of the revenue the arcade re-
ceives
per
child.
(e) Use the probability distribution you created in part d) to calculate the
mean and variance of the revenue the arcade receives
per
child.
(f) Are your answers in part c) & part e) identical?
Transcribed Image Text:5. After watching a number of children playing games in a video arcade, a statistics practitioner estimated the following probability distribution of X, the number of games per visit. 1 3 4 f(x) 0.05 0.2 0.3 0.25 0.2 (a) What is the probability that a child will play at most three games? (b) What is the mean and variance of the number of games played? (c) Suppose that each game costs $2 to play. Use the laws of expected value and variance to determine the expected value and variance of the revenue (the amount of money) the arcade receives per child. (d) Determine the probability distribution of the revenue the arcade re- ceives per child. (e) Use the probability distribution you created in part d) to calculate the mean and variance of the revenue the arcade receives per child. (f) Are your answers in part c) & part e) identical?
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