00:01
Hello.
00:03
So in this question we've been giving these two z values.
00:05
We want to find the area between them under the standard normal curve.
00:11
So let's quickly look at the standard normal curve.
00:20
So this is the standard normal curve.
00:24
We have a negative z value.
00:26
So that's going to be on the far left.
00:27
That's negative 1 .69.
00:30
On the far right, we're going to have a positive value plus 1 .69.
00:36
So the area we are looking for is the area of.
00:40
This region between the two values so under the standard normal curve the area is the same as the probability between these two values that's going to be negative 1 .69 less than z less than 1 .69 so let's see how we can solve this so this is going to be probability of z less than 1 .69 minus probability of z less than negative 1 .69.
01:19
So at this point, we will need the z table to figure out these probabilities...