According to the American Automobile Association, the average cost of a gallon of regular unleaded fuel at gas stations in January 2020 was $3.85. Assume that the standard deviation of such costs was $4.77. Suppose that a random sample of 60 gas stations was selected from the population and the cost per gallon of regular unleaded fuel was determined for each gas station. Consider X¯, the sample mean cost per gallon. Describe the sampling distribution of X¯. Find the probability that the sample had a mean fuel cost between $3.8 and $5. How would the sampling distribution of X¯ change if the sample size were doubled? please give step by step answer
According to the American Automobile Association, the average cost of a gallon of regular unleaded fuel at gas stations in January 2020 was $3.85. Assume that the standard deviation of such costs was $4.77. Suppose that a random sample of 60 gas stations was selected from the population and the cost per gallon of regular unleaded fuel was determined for each gas station. Consider X¯, the sample mean cost per gallon. Describe the sampling distribution of X¯. Find the probability that the sample had a mean fuel cost between $3.8 and $5. How would the sampling distribution of X¯ change if the sample size were doubled? please give step by step answer
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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According to the American Automobile Association, the average cost of a gallon
of regular unleaded fuel at gas stations in January 2020 was $3.85. Assume that the
standard deviation of such costs was $4.77. Suppose that a random sample of 60 gas
stations was selected from the population and the cost per gallon of regular unleaded fuel
was determined for each gas station. Consider X¯, the sample mean cost per gallon.
Describe the sampling distribution of X¯.
Find the probability that the sample had a mean fuel cost between $3.8 and $5.
How would the sampling distribution of X¯ change if the sample size were doubled?
please give step by step answer
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