4. 66% of Americans support death penalty (Gallup, 2004). Seven people are randomly selected. Let the random variable X be the number of Americans who support death penalty. a. Explain why X is a binomial random variable. b. What is the probability that exactly 5 people selected support death penalty? 8 c. What is the probability that at least 4 people selected are against death penalty?
4. 66% of Americans support death penalty (Gallup, 2004). Seven people are randomly selected. Let the random variable X be the number of Americans who support death penalty. a. Explain why X is a binomial random variable. b. What is the probability that exactly 5 people selected support death penalty? 8 c. What is the probability that at least 4 people selected are against death penalty?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter6: Ratio, Proportion, And Probability
Section6.7: Probability And Odds
Problem 2C
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
Transcribed Image Text:4. 66% of Americans support death penalty (Gallup, 2004). Seven people are randomly
selected. Let the random variable X be the number of Americans who support death
penalty.
a. Explain why X is a binomial random variable.
b. What is the probability that exactly 5 people selected support death penalty?
8
c. What is the probability that at least 4 people selected are against death penalty?
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