18. An automobile manufacturer recommends oil change intervals of 3,000 miles. To compare actual intervals to the recommendation, the company randomly samples records of 50 oil changes at service facilities and obtains sample mean of 3,752 miles with a sample standard deviation of 638 miles. Determine whether the data provide sufficient evidence, at 5% level of significance, that the population mean interval between oil changes exceeds 3,000 miles.
18. An automobile manufacturer recommends oil change intervals of 3,000 miles. To compare actual intervals to the recommendation, the company randomly samples records of 50 oil changes at service facilities and obtains sample mean of 3,752 miles with a sample standard deviation of 638 miles. Determine whether the data provide sufficient evidence, at 5% level of significance, that the population mean interval between oil changes exceeds 3,000 miles.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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