The Professor's Response
Hello Professor,
I am trying to do Homework Problem 40 for Section 7.4. I can't seem to figure out how to use it with Z instead of T. Can you please explain how to do this problem?
Thank you
See the professor's answer below.
Hi Genessys,
Here is a video explaining the problem:
Just to summarize what the video shows: the first step here is to check if n is greater than 30. If it is, we find Za/2 not ta/2. Since, we are finding Za/2, we do not need to worry about the degrees of freedom. We go to the t-table looking up a/2 in the top row, then we go straight to the bottom of that 0.01 row where the Za/2 value is located.