Question
Question Which type of test is used in the following scenario: A manufacturer claims that the mean lifetime of a new cutting bladeis 2 years.
Question
Which type of test is used in the following scenario:
A manufacturer claims that the mean lifetime of a new cutting bladeis 2 years. Fourteen bladesare randomly selected and their lifetime is measured. Assume thepopulationfollows anormal distributions with known standard deviation.
Select the correct answer below:
The test is right-tailed because the alternative hypothesis is Ha:>2.
The test is left-tailed because the alternative hypothesis is Ha:<2.
The test is right-tailed because the alternative hypothesis is Ha:<2.
The test is left-tailed because the alternative hypothesis is Ha:>2.
The test is two-tailed because the alternative hypothesis is Ha:2.
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A Survey of Mathematics with Applications
Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde
10th edition
134112105, 134112342, 9780134112343, 9780134112268, 134112261, 978-0134112107
