(d) Compute the standard deviation of the random variable X. 0x = hits (Round to three decimal places as needed.) (e) What is the probability that in a randomly selected game, the player got 2 hits? (Type an integer or a decimal. Do not round.) (f) What is the probability that in a randomly selected game, the player got more than 1 hit? (Type an integer or a decimal. Do not round.)

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.4: Expected Value
Problem 20E
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Question
10:39
K
In the probability distribution to the right, the random variable X represents the number of hits a
baseball player obtained in a game over the course of a season. Complete parts (a) through (f)
below.
(a) Verify that this is a discrete probability distribution.
This is a discrete probability distribution because all of the probabilities are between
and the sum of the probabilities is 1.
(Type whole numbers. Use ascending order.)
(b) Draw a graph of the probability distribution. Describe the shape of the distribution.
Graph the probability distribution. Choose the correct graph below.
O A.
Probability
A
0.4-
0.3-
0.24
0.1-
0-
45
Number of Hits
B.
0.4+
0.3+
0.2+
0.1+
0-
Describe the shape of the distribution.
0 1 2 3
Number of Hits
The distribution has one mode and is skewed left.
(c) Compute and interpret the mean of the random variable X.
Hx= 1.6275 hits
(Type an integer or a decimal. Do not round.)
Which of the following interpretations of the mean is correct?
C.
0.4+
0.3+
0.2+
0.1-
0-
Vol) 1
2 ...| 46 | 14%
0
Number of Hits
(Type an integer or a decimal. Do not round.)
0x = hits
(Round to three decimal places as needed.)
(e) What is the probability that in a randomly selected game, the player got 2 hits?
Q
O D.
0.4-
0.3-
0.2+
0.1-
0
(Type an integer or a decimal. Do not round.)
(f) What is the probability that in a randomly selected game, the player got more than 1 hit?
X
0
1
2
3
4
5
P(x)
0.1679
0.3345
0.2863
0.1497
0.0367
0.0249
OA. Over the course of many games, one would expect the mean number of hits per game to be the mean of the
random variable.
and 1, inclusive,
B. The observed number of hits per game will be equal to the mean number of hits per game for most games.
C. In any number of games, one would expect the mean number of hits per game to be the mean of the random
variable.
D. The observed number of hits per game will be less than the mean number of hits per game for most games.
(d) Compute the standard deviation of the random variable X.
0 1 2 3 4 5
Number of Hits
Transcribed Image Text:10:39 K In the probability distribution to the right, the random variable X represents the number of hits a baseball player obtained in a game over the course of a season. Complete parts (a) through (f) below. (a) Verify that this is a discrete probability distribution. This is a discrete probability distribution because all of the probabilities are between and the sum of the probabilities is 1. (Type whole numbers. Use ascending order.) (b) Draw a graph of the probability distribution. Describe the shape of the distribution. Graph the probability distribution. Choose the correct graph below. O A. Probability A 0.4- 0.3- 0.24 0.1- 0- 45 Number of Hits B. 0.4+ 0.3+ 0.2+ 0.1+ 0- Describe the shape of the distribution. 0 1 2 3 Number of Hits The distribution has one mode and is skewed left. (c) Compute and interpret the mean of the random variable X. Hx= 1.6275 hits (Type an integer or a decimal. Do not round.) Which of the following interpretations of the mean is correct? C. 0.4+ 0.3+ 0.2+ 0.1- 0- Vol) 1 2 ...| 46 | 14% 0 Number of Hits (Type an integer or a decimal. Do not round.) 0x = hits (Round to three decimal places as needed.) (e) What is the probability that in a randomly selected game, the player got 2 hits? Q O D. 0.4- 0.3- 0.2+ 0.1- 0 (Type an integer or a decimal. Do not round.) (f) What is the probability that in a randomly selected game, the player got more than 1 hit? X 0 1 2 3 4 5 P(x) 0.1679 0.3345 0.2863 0.1497 0.0367 0.0249 OA. Over the course of many games, one would expect the mean number of hits per game to be the mean of the random variable. and 1, inclusive, B. The observed number of hits per game will be equal to the mean number of hits per game for most games. C. In any number of games, one would expect the mean number of hits per game to be the mean of the random variable. D. The observed number of hits per game will be less than the mean number of hits per game for most games. (d) Compute the standard deviation of the random variable X. 0 1 2 3 4 5 Number of Hits
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