00:01
So for your problem, you're looking at an example of a distribution in which the exam has a mean of 35 and a standard deviation of 6, and they were asked how well they did on the exam.
00:23
And it says below the scores like these observed or from something, and i don't see this.
00:28
But if we're assuming that it's an approximate normal distribution, that means the actual scores would look like this.
00:39
Where they're 35 is here.
00:41
And if we go up six units, this would be at 41, up six more units, that would be at 47, up six more units, that would be at 53.
00:51
If we go down six units, we're gonna be at 29, down six going to be at 23, and down six more, we're gonna be at 17.
01:00
And so we would, 68 % of the students would score in here.
01:05
We would have 95 % of the student score in here.
01:09
And we would have 99 .7 % score in here...