00:01
The gmat, we're told that our average is 547, and our standard deviation is 100.
00:13
And they want us to use the imperial rule, which is the 68, 95, 99 rule.
00:21
So 60%, 68 % of the data is within one standard deviation of the mean.
00:30
So that means 100 less than 547 and 100 more.
00:41
95 % of data is within two standard deviations, and 99 % of data is within three standard deviations.
01:06
And we can also see that on a bell curve.
01:13
So my means, 547, 647, 747, 847.
01:24
And on the other side, 447, 347, and 247.
01:32
And 247, ran out of room a little bit here.
01:39
And i know that this portion is 34 .1%.
01:45
This portion is 13 .6, 2 .1, and 0 .1 .1...