00:01
In this problem, we are required to find the area between z value equal to 0 and the z value equal to 1 .85, considering a standard normal distribution.
00:13
So if we observe a standard normal distribution curve, we see that it looks somewhat of this kind and this is symmetric about the z value equal to 0.
00:24
So basically the entire area under this curve is 1, and the area to the left and right of the z value equal to 0, that's 0 .5.
00:33
And if we observe the number 1 .85, well, that lies to the right of the z value equal to 0, and we have to get the area between these two given z values, so that's represented by the shaded portion under the curve as shown here.
00:48
And we can compute that the required area, that would be the probability that the z value is greater than 0, but less than 1 .85, so we can write this as probability that the the z value is less than 1 .85, which represents the entire area to the left of z value equal to 1 .85...