Mathematics, 06.05.2020 08:40 nicollexo21
A production line produces rulers that are supposed to be 12 inches long. A sample of 49 of the rulers had a mean of 12.1 and a standard deviation of .5 inches. The quality control specialist responsible for the production line decides to do a hypothesis test at the 90 percent significance level to determine whether the production line is really producing rulers that are 12 inches long or not. a. What is the null hypothesis? b. What is the alternative hypothesis? c. What is the value of the test statistic? d. What is the rejection region (with its numerical value)? e. What conclusion do you draw? f. What does this mean in terms of the problem situation?
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