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Question 8.14 Suppose the probability distribution for X = number of jobs held during the past
year for students at a school is as follows:
# Jobs (X) 0 1 2 3 4
Probability (p) .14 .37 .29 .15 .05
1.
Find (P(X LE 2), the probability that a randomly selected student held two or fewer jobs during
the past year. (LE means less than or equal too.)
A) 29%
B) 51%
C) 67%
D) 80%
2.
Find the probability that a randomly selected student held either one or two jobs during the past
year.
A) 11%
B) 40%
C) 66%
D) 80%
Solution
1. P(X<2)=P(X=0)+P(X=1)=0.14+0.37=0.51----------B 2. P(X=1 U
X=2)=P(X=1)+P(X=2)=0.37+0.29=0.66----------C

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Question 8.14 Suppose the probability distribution for X = number of.pdf

  • 1. Question 8.14 Suppose the probability distribution for X = number of jobs held during the past year for students at a school is as follows: # Jobs (X) 0 1 2 3 4 Probability (p) .14 .37 .29 .15 .05 1. Find (P(X LE 2), the probability that a randomly selected student held two or fewer jobs during the past year. (LE means less than or equal too.) A) 29% B) 51% C) 67% D) 80% 2. Find the probability that a randomly selected student held either one or two jobs during the past year. A) 11% B) 40% C) 66% D) 80% Solution 1. P(X<2)=P(X=0)+P(X=1)=0.14+0.37=0.51----------B 2. P(X=1 U X=2)=P(X=1)+P(X=2)=0.37+0.29=0.66----------C