40,900 km. Can it be concluded that the new tyre is significantly better than the old one, using the significance level of 0.01?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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le 12.1 A company manufacturing automobile tyres finds that tyre-life is normally distributed
with a mean of 40,000 km and standard deviation of 3,000 km. It is believed that a change in the
production process will result in a better product and the company has developed a new tyre. A sample
of 100 new tyres has been selected. The company has found that the mean life of these new tyres is
40,900 km. Can it be concluded that the new tyre is significantly better than the old one, using the
significance level of 0.01?
Transcribed Image Text:le 12.1 A company manufacturing automobile tyres finds that tyre-life is normally distributed with a mean of 40,000 km and standard deviation of 3,000 km. It is believed that a change in the production process will result in a better product and the company has developed a new tyre. A sample of 100 new tyres has been selected. The company has found that the mean life of these new tyres is 40,900 km. Can it be concluded that the new tyre is significantly better than the old one, using the significance level of 0.01?
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