00:01
Hi, i'm david and i'm here to have you answering your question.
00:04
Now let me bring up your question here.
00:07
In the question here we are given the frequency table and from here we need to find the mean standard division and the variance.
00:17
So first of all we need to find the mean by completing the column here when we turn the x times probability the x.
00:25
So we're going to multiply them like a pair here.
00:34
And when we multiply them the first one we will multiply them, equal to the 0 .18.
00:39
This one we have the 0 .42.
00:42
This again equal to the zirpon.
00:45
Here we have the 3 times 0 .29 equal to the 0 .87.
00:52
Here we have the 4 times 0 .18 equal to the 0 .72.
00:58
Here we have 5 times 0 .14 equal to the 0 .7.
01:02
By the way, we need to verify if this will be the valid probability function so we end up everything here so we have the 0 .18 plus 0 .21 plus 0 .29 plus 0 .18 plus 0 .14 and exactly equal to 1 here.
01:21
So the next one will you to find the sum here.
01:25
So i have the 0 .18 plus 0 .12 plus 0 .87 plus 0 .72 plus 7 .7 can equal to the 2 .89...