00:01
In this question, we're given that x follows a poison distribution.
00:06
The mean is 15.
00:07
And we want to use excel to find the probabilities to these four questions here.
00:12
For the first question, we want to find probability x less than equals to 10.
00:16
Now, less than equal means cumulative distribution function.
00:20
So in the cell that you want, key in equal sign, type in poison.
00:25
Dot, v -i -s -t, open bracket.
00:29
Now, x here means the success we want, that is 10.
00:32
10 and mean here is the mean of the poison that is 15.
00:38
And cumulative here is a true or false.
00:41
If it's cumulative, that means less than equal.
00:43
Type in true, if it's not, that means just you want that equal only at that point, then it's false...