00:01
Hey there, welcome to numerate.
00:03
We are asked to find a probability that a given score is less than negative 1 .86, knowing that our mean here equals 0 and our standard deviation equals 1.
00:16
So knowing this, we will have our z score equaling our x score.
00:22
So we have our x score in this case given to us as negative 1 .86.
00:32
Hence, when we find the probability in which we can denote it as the probability that the given score is less than, so z score is less than, negative 1 .86.
00:48
So therefore, to find this, the probability here, we would need to show a depiction.
00:55
So the depiction that we can show is our normal curve like so, somewhat like this.
01:15
All right.
01:17
And then we are just looking at the left -hand side of the negative 1 .86.
01:23
So we know that negative 1 .86, the cutoff is right here, around right here.
01:30
So negative 1 .86.
01:33
And we are going to be shading it to the left because we're looking at less than...