An automobile manufacturer claims that their car has a 30.8 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car. After testing 5 cars they found a mean MPG of 30.6 with a standard deviation of 1.6 MPG. Is there sufficient evidence at the 0.025 level that the cars underperform the manufacturer's MPG rating? State the null and alternative hypotheses for the above scenario.
An automobile manufacturer claims that their car has a 30.8 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car. After testing 5 cars they found a mean MPG of 30.6 with a standard deviation of 1.6 MPG. Is there sufficient evidence at the 0.025 level that the cars underperform the manufacturer's MPG rating? State the null and alternative hypotheses for the above scenario.
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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SECTION 10.1

Transcribed Image Text:An automobile manufacturer claims that their car has a 30.8 miles/gallon (MPG) rating. An independent testing firm has been contracted
to test the MPG for this car. After testing 5 cars they found a mean MPG of 30.6 with a standard deviation of 1.6 MPG. Is there sufficient
evidence at the 0.025 level that the cars underperform the manufacturer's MPG rating?
State the null and alternative hypotheses for the above scenario.
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