00:01
For this question, there is given an probability mess function, and we have to determine when x is equal to 2.
00:07
What about the probability here? so let's take a look at part 8.
00:11
The probability of x is equal to 2, which is equal to f of 2, that is 0 .1 here.
00:20
And the next one, which is the probability of the x value is between 2 and negative 1.
00:28
So that should be so we have the numbers for x is equal to zero x is equal to two so that would be x is equal to so in this interval we have zero and the probability of x is equal to one the probability of x is equal to zero which is given again 0 .1 and the probability of x is equal to one which is zero and this is 0 .1 and for c we have to just find the mu that is equal to the expected value which is x i times the probability of x i so the mu of x is equal to this is also the expected value of x so i'm going to multiply this one this is 0 times 0 .1 plus and 2 times 0 .1 plus this is 4 times 0 .5 and plus 6 times 0 .3 let's get the answer this is 0 .2 2 .0 and this is 1 .8 so the end of the end is 4.
01:31
So that means the mean value here, which is a full.
01:35
And for d, which is the variance, so that sigma x squared, that means the variance.
01:42
So what we have the formula for this one, this is the expected value of x squared minus the expected value of x squared.
01:51
Okay, let's get the expected value of x squared...