00:01
Okay, for this question, we're given the pdf, the probability density function for a distribution here, shown as little f of x, and we're asked to find the cumulative distribution function.
00:17
To find the cumulative distribution function given the pdf, all that we have to do is integrate our pdf, so integral 1 over 3x minus 1 over 6, with respect to.
00:34
To x without bounds on our integral first.
00:41
So to do that, we're going to get 1 over 6 x squared minus 1 over 6x plus a constant, right? and this is almost the complete answer.
00:59
We just need to fill in what our constant is.
01:01
And there's a couple of ways we can do that.
01:02
The way that i prefer is to pick the right end point of our function and check.
01:09
Check out what our cdf at that point is going to be equal to.
01:14
If we plug in four here, we'll get 16 over 6 minus 4 over 6 plus c, which is the same as 12 over 6 plus c, getting ahead of myself, plus c, which is the same as 2 plus c...