40% of Americans who travel by car look for gas stations and grocery stores that are nearby or visible from the road. Suppose a random sample of n = 30 Americans who travel by car are asked how they determine where to stop for food and gas. Let x be the number of the sample that responds that it looks for gas stations and food stores that are close to or visible from the road (Use the binomial formula to solve the exercise). Answer: a) What is the mean if x = 12? B) What is the variance of x? c) Calculate the interval μ ± 2σ d) What values of the binomial random variable x fall in this interval?
40% of Americans who travel by car look for gas stations and grocery stores that are nearby or visible from the road. Suppose a random sample of n = 30 Americans who travel by car are asked how they determine where to stop for food and gas. Let x be the number of the sample that responds that it looks for gas stations and food stores that are close to or visible from the road (Use the binomial formula to solve the exercise). Answer: a) What is the mean if x = 12? B) What is the variance of x? c) Calculate the interval μ ± 2σ d) What values of the binomial random variable x fall in this interval?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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40% of Americans who travel by car look for gas stations and grocery stores that are nearby or visible from the road. Suppose a random sample of n = 30 Americans who travel by car are asked how they determine where to stop for food and gas. Let x be the number of the sample that responds that it looks for gas stations and food stores that are close to or visible from the road (Use the binomial formula to solve the exercise). Answer:
a) What is the mean if x = 12?
B) What is the variance of x?
c) Calculate the interval μ ± 2σ
d) What values of the binomial random variable x fall in this interval?
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