MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:An automobile manufacturer has given its van a 31.0 miles/gallon (MPG) rating. An independent testing firm has been contracted to test
the actual MPG for this van since it is believed that the van performs over the manufacturer's MPG rating. After testing 150 vans, they
found a mean MPG of 31.2. Assume the population standard deviation is known to be 2.1. Is there sufficient evidence at the 0.02 level to
support the testing firm's claim?
Step 2 of 6: Find the value of the test statistic. Round your answer to two decimal places.
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