Question

13. The value used for the mean weight of elevator passengers by the state Division of Labor is 190 pounds. The Division wishes to investigate whether this value needs to be changed (upward or downward). A sample of 27 individuals in buildings having an elevator yielded sample mean 196 pounds and sample standard deviation 35 pounds. Assume the population is normally distributed. (a) State the null and alternative hypotheses for the test.

13A. [2 points] Construct the rejection region for ? = .05 What is critical value :………..

13B (2 points) State the correct formula for the test statistic. Compute the value of the test statistic X.XX •

13C make a decision What is decision and State a conclusion about the mean weight of elevator passengers, based on the test you performed at alpha 0.05 level [2 points] a. Reject H0, therefore not supporting claim b. Fail to reject Ho, supporting claim c. Reject H0, therefore supporting claim d. Fail to reject Ho, not supporting claim

13D Compute a 95% confidence interval for the mean weight of all elevator passengers. [2 points] What is margin of error ? answer format : X.XXXX

Answer 1

Let denotes the mean weight of elevator passengers by the state Division of Labor.

D)