00:01
So this problem said, find the total percent or the total percent of the area underneath the standard normal curve between the z score of negative 1 .4 and 0 .75.
00:14
So on a normal curve, before i go back and look at the charts, you've got a normal curve and in the center of your curve, that's at zero.
00:24
So we're looking at negative 1 .4 is over here and 0 .75 is over.
00:30
Over here.
00:32
So if i want the area in between the curves, i need to find the z score for both of them.
00:36
So if i look up on a standard normal curve, so here's my two curves.
00:41
So if i look at negative 1 .4, so this value on here is at negative 0 .0808.
00:52
Okay.
00:54
So negative point, sorry, it's 0 .0808.
00:58
That gives me the area to the left for negative 1 .4 that gives me this area...