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A random sample of the price of gasoline from 30 gas stations in a region gives the statistics below. Complete parts a) through c). y=$4.49, s = $0.26 a) Find a 95% confidence interval for the mean price of regular gasoline in that region. 4.382 4.598 (Round to three decimal places as needed.) b) Find the 90% confidence interval for the mean. (Round to three decimal places as needed.) c) If we had the same statistics from a sample of 60 stations, what would the 95% confidence interval be now? (Round to three decimal places as needed.)

A random sample of the price of gasoline from 30 gas stations in a region gives the statistics below. Complete parts a) through c). y=$4.49, s = $0.26 a) Find a 95% confidence interval for the mean price of regular gasoline in that region. 4.382 4.598 (Round to three decimal places as needed.) b) Find the 90% confidence interval for the mean. (Round to three decimal places as needed.) c) If we had the same statistics from a sample of 60 stations, what would the 95% confidence interval be now? (Round to three decimal places as needed.)

MATLAB: An Introduction with Applications
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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Question 16 of 20 A random sample of the price of gasoline from 30 gas stations in a region gives the statistics below. Complete parts a) through c). y=$4.49, s = $0.26 a) Find a 95% confidence interval for the mean price of regular gasoline in that region. 4.382 4.598 (Round to three decimal places as needed.) b) Find the 90% confidence interval for the mean. (Round to three decimal places as needed.) c) If we had the same statistics from a sample of 60 stations, what would the 95% confidence interval be now? (Round to three decimal places as needed.)
Transcribed Image Text:Question 16 of 20 A random sample of the price of gasoline from 30 gas stations in a region gives the statistics below. Complete parts a) through c). y=$4.49, s = $0.26 a) Find a 95% confidence interval for the mean price of regular gasoline in that region. 4.382 4.598 (Round to three decimal places as needed.) b) Find the 90% confidence interval for the mean. (Round to three decimal places as needed.) c) If we had the same statistics from a sample of 60 stations, what would the 95% confidence interval be now? (Round to three decimal places as needed.)
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