Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Need Help with Stats Homework!?
A manufacturer of sprinkler systems used for fire protection in office buildings claims that the true average system is 130 degrees. A sample of n=16 systems, when tested, yields a sample average activation temperature of 133.5 degrees. If the distribution of activation times is normal with standard deviation of 1.5 degrees, test the hypothesis at significance level 'alpha'=0.05:
a) Find the acceptance region.
b) Compute the value of test statistic.
c) Make a decision.
Thanks=)
1 Answer
- 1 decade agoFavorite Answer
a) The acceptance region under the N(0,1) graph is -1.96<z<1.96 for a two sided alternative hypothesis of change in any direction or Z>1.645 for a one sided alternative hypothesis for change greater than the mean 130.
b) [133.5-130]/(1.5/4)=9.3333
c) Reject Ho in either case (ie. one sided or two sided test)
