The Public Housing Authority in a certain community conducted a survey of 1000 families to determine the distribution of families by size. The results are given below. Family Size 2 3 4 5 6 7 8 Frequency of Occurrence 318 199 200 120 51 25 87 (a) Find the probability distribution of the random variable X, where X denotes the number of people in a randomly chosen family. (Enter your answers to three decimal places.) Family Size 2 3 5 6 7 8 P(X = x) (b) Draw the histogram corresponding to the probability distribution found in part (a). 0.35 0.35 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 O 4 0.35 0.30 0.25 0.20 0.15 0.10 0.05 1 2 3 4 5 6 7 318 199 200 120 51 25 87 X X O 0.35 0.30 0.25 0.20 0.15 0.10 0.05 O 2 3 4 5 6 7 8 2 3 4 5 6 7 8 x X O (c) Find the probability that a family chosen at random from those surveyed has more than five members. (Enter your answer to three decimal places.)

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.4: Discrete Random Variables; Applications To Decision Making
Problem 1E
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The Public Housing Authority in a certain community conducted a survey of 1000 families to determine the distribution of families by size. The results are given below.
Family Size
Frequency of
Occurrence 318 199 200 120
51 25 87
(a) Find the probability distribution of the random variable X, where X denotes the number of people in a randomly chosen family. (Enter your answers to three decimal places.)
Family Size
3
5
6
7
8
P(X = x)
0.35
0.30
0.25
0.20
0.15
0.10
0.05
2
1
2
3
4
2 3
5
4
6
(b) Draw the histogram corresponding to the probability distribution found in part (a).
0.35
0.35
0.30
0.30
0.25
0.25
0.20
0.20
0.15
0.15
0.10
0.10
0.05
0.05
7
4 5 6 7
8
318 199 200 120 51 25 87
X
X
0.35
0.30
0.25
0.20
0.15
0.10
0.05
2
2
3
3
4
4
5 6 7 8
5
6
7
8
X
X
(c) Find the probability that a family chosen at random from those surveyed has more than five members. (Enter your answer to three decimal places.)
Transcribed Image Text:The Public Housing Authority in a certain community conducted a survey of 1000 families to determine the distribution of families by size. The results are given below. Family Size Frequency of Occurrence 318 199 200 120 51 25 87 (a) Find the probability distribution of the random variable X, where X denotes the number of people in a randomly chosen family. (Enter your answers to three decimal places.) Family Size 3 5 6 7 8 P(X = x) 0.35 0.30 0.25 0.20 0.15 0.10 0.05 2 1 2 3 4 2 3 5 4 6 (b) Draw the histogram corresponding to the probability distribution found in part (a). 0.35 0.35 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 7 4 5 6 7 8 318 199 200 120 51 25 87 X X 0.35 0.30 0.25 0.20 0.15 0.10 0.05 2 2 3 3 4 4 5 6 7 8 5 6 7 8 X X (c) Find the probability that a family chosen at random from those surveyed has more than five members. (Enter your answer to three decimal places.)
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