Question

Test the hypotheses for the following problems: Show the 6-steps solution:

1. In a certain city, the mean age of newly hired teachers is 28.95 with a standard deviation of 16.31. A sample of 45 newly hired teachers this year was taken and found to have a mean age of 35.03. Does this indicate that the age of newly hired teachers in this year has increased ? Test @ 5% level of significance.

Answer 1

Answer:

In a certain city, the mean age of newly hired teachers is 28.95 with a standard deviation of 16.31. A sample of 45 newly hired teachers this year was taken and found to have a mean age of 35.03. this indicate that the age of newly hired teachers in this year has increased