00:01
Hi, i'm david and i'm here to help you answer your question.
00:03
Let me bring up your question here.
00:06
Here we have two questions.
00:09
The normal distribution is normal distribution.
00:14
We'll continue that if x followed by the normal with the mean meal and the sigma, and then if we think the x minus the mean divided by standard deviation, it will follow by the standard division.
00:27
In the question 1 here, we have the x followed by the normal when the mule equal to the 9 .1 .2 and the standard division equal to the 0 .05.
00:46
So we want to find the probability that the weight is less than 9 .05.
00:54
It means then we want to find the probability x smaller than 9 .05.
00:58
Now the first step we need to turn the x into the z.
01:02
In order to do that we have to turn the 9 .05 minus the mean divided by the standard standard standard standard standard deviation and if we do that we should get equal to the probability 9 .0 .05 minus 9 .1 .2 divided by 0 .0 .05, get equal to the z smaller than minus 1 .4.
01:31
Now to compute this probability, let me bring up the z table.
01:35
I will show you how to use the z table.
01:40
I will put the table on the right here for you.
01:44
Now, look at the table, we want to find the probability g smaller than minus 1 .4.
01:50
First will locate the minus 1 .4...