0:00
All right.
00:01
So if the mean salary offered to students who are graduating from this university, this year is this much money with a standard evasion of this much, a random sample of 75 university students graduating this year.
00:18
What's the probability that the mean salary offer for these 75 students? is this much or more? so this is looking at the sample of 75.
00:26
That's an important distinction here.
00:28
So if the population mean is the given value here, 24 ,230, and the population standardization is 3712.
00:39
But we're looking at the sampling distribution, we're at the mean of the sample.
00:46
And that's given, we do that, we use this form of the calculate the z score.
00:51
So it's a bit tighter of a normal curve.
00:53
So it's less like this and more like this, something like this.
01:08
I mean, it starts to scale, but there go, so it's like this purple one.
01:12
It's a bit tighter.
01:23
It's a little different.
01:24
So anyway, so what we do is we take the mean that we're looking at.
01:28
We want to know is it 24 ,700 or more.
01:30
So that's our x bar minus the mean...