00:01
Hi, i'm david and i'm here to help you answer your question.
00:04
Now let me bring up your question here.
00:07
In this question we discuss about the normal distribution and for the normal distribution, let me remind you that we will have the graph look like the bell curve and it will be symmetry about the mean here.
00:25
Now which of the falling is not true.
00:29
It's not true.
00:30
So percentile rank on the mean is on way be equal to feet.
00:34
If you might show you that because of the symmetry, the area on the left, it will be the same as the area on the right.
00:43
And this area here equal to the 50%.
00:50
And therefore, the percentage rank on the mean in this own way be equal to the 50.
01:00
And that's make sense.
01:03
So that's the first one should be correct.
01:05
The second statement, the mean of the z -scar, is always zero...