Hello,

I was looking at some of the different teaching scripts and I noticed this one found in the "One Sample Mean", Animation Script "Power for Testing Mean".

I was confused on the following:

1. What is the 'green vertical bar' titled "Estimated Mean" do and what does this represent?

I tried moving the bar back and forth and it does not appear to change any of the calculated values (Power, std. error of mean, beta, etc..).

2. Am I correct in understanding that the " 'True Mean' " (blue distribution) is the average determined by the sample or is that what the "Estimated Mean" supposed to be?

3. Why is the distribution of the " 'True Mean' " changing as it gets further or closer to the "Hypothesized Mean"?

4. Is the "Hypothesized Mean" (red distribution) distribution a normal distribution?

5. Is the " 'True mean' " distribution a non-central F distribution?

I took snapshots of the script below.

Thank you,

Nate