00:01
Okay, first off, you do need to make sure you have a graphing calculator that has the normal cdf function available to be able to figure out this problem.
00:09
If you don't have a calculator with that function, you can go online and just type into google online calculator with normal cdf, and it should be able to find you something that you can use online.
00:20
But assuming that you have found something, some sort of calculator either in person or online, that can do normal cdf, we need four pieces of information.
00:28
We need a mean, a standard deviation, we need a low and a high.
00:32
We are told that our mean is going to be eight for this.
00:36
We are told that our standard deviation is one.
00:40
This one is interesting because what it's asking us is to find the probability for when 7 is less than or equal to x.
00:48
Well, first off, we don't need to write it like that.
00:51
Why don't we write that inequality the way that it's actually useful to us, which would be that x is greater than or equal to 7, meaning it's asking us to go on.
00:59
On the normal distribution from 7 to the right.
01:02
Well, that means 7 is going to be my lowest number.
01:05
I'm not caring about anything lower than 7, but i'm not really sure what my high is...