00:01
Hello.
00:03
So this question is in two parts.
00:05
So let's look at the first part.
00:07
So for the first part, we have a mean normal distribution with a mean of 2 .2.
00:14
In standard division 2b .6, we want to find the probability of x greater than 4.
00:32
So the distribution is normal.
00:34
So we do x minus mu over standard division greater than 4 minus.
00:41
2 .2 divided by 0 .6.
00:50
This is z.
00:54
Now let's see what we get for that side.
00:59
Not just 1 .8 divided by 0 .6.
01:05
That's going to be 3.
01:09
This is the same as the probability of z less than negative 3.
01:15
So now we will need the z table to figure out this probability.
01:21
When z is negative 3, we're going to have 0 .00 -135...