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A survey of 225 gas stations in the New Haven area revealed the following data of the price per gallon of regular gasoline. Mean= $2.82, s= .12. Construct a confidence interval using:(round to nearest "tenth" of a cent i.e. $3.015): a) .85 level of confidence. b) .96 level of confidence. c) .99 level of confidence, but decrease the "n" to 25.

A survey of 225 gas stations in the New Haven area revealed the following data of the price per gallon of regular gasoline. Mean= $2.82, s= .12. Construct a confidence interval using:(round to nearest "tenth" of a cent i.e. $3.015): a) .85 level of confidence. b) .96 level of confidence. c) .99 level of confidence, but decrease the "n" to 25.

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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Please round it to 4 decimal places and add the excel formulas as well.

A survey of 225 gas stations in the New Haven area revealed the following data of the price per gallon of regular gasoline. Mean = $2.82, s = .12. Construct a confidence interval using (round to nearest "tenth" of a cent i.e. $3.015): a) .85 level of confidence. b) .96 level of confidence. c) .99 level of confidence, but decrease the "n" to 25.
Transcribed Image Text:A survey of 225 gas stations in the New Haven area revealed the following data of the price per gallon of regular gasoline. Mean = $2.82, s = .12. Construct a confidence interval using (round to nearest "tenth" of a cent i.e. $3.015): a) .85 level of confidence. b) .96 level of confidence. c) .99 level of confidence, but decrease the "n" to 25.
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