00:01
Okay, so we have here a sample of 23 observations, and we're supposed to find a bunch of things.
00:06
The first thing i'm going to do is i'm going to put them all in a list in my calculator.
00:10
And so you can put this in a calculator, you can do it in excel, you can do it in r, you can do it in lots of different ways.
00:18
I'm doing it with my calculator.
00:20
The first thing you have to do is find the mean.
00:22
You could do this by hand by taking the sum of all the values and divide by n.
00:26
I just let my calculator do it and it comes out to 736 .52 approximately.
00:32
For b, the standard deviation, that's kind of a long formula, but your calculator can just do it.
00:38
If you run one, like there's a program in the calculator called one variable statistics, one var statistics, that you get by clicking stat and calc and it just spits all of this out for you for your data set.
00:54
So, anyways, when we get the standard deviation, that's s, and that is 539 .96.
01:02
You do want to use s, which is the sample standard deviation, not the population standard deviation.
01:10
For c, we want the median.
01:12
That's the middle value if you line them all up.
01:15
But once again, my calculator can just give it to me and gives me 513...