Suppose 36% of movie-goers say that horror is their favorite movie genre. If a random sample...

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Question

Suppose 36% of movie-goers say that horror is their favorite movie genre. If a random sample...

Suppose 36% of movie-goers say that horror is their favorite movie genre. If a random

sample of 120 movie-goers is taken, what are the mean and standard deviation of the

number of movie-goers that prefer horror?

math Statistics-And-Probability

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Answer 1

Answer #1

Solution :

Given that,

p = 36%=0.36

q = 1 - p =1-0.36=0.64

n = 120

Using binomial distribution,

mean = = n * p = 120*0.36=43.2

standard deviation = n * p * q = 120*0.36*0.64=5.2581

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Answer 2

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