00:02
Here in this problem, we have to find the mean deviation about the mean by using the given data.
00:07
So here we have given the following table.
00:10
Now in order to find the mean deviation, first of all we will find the mean.
00:14
For that we will find fixi.
00:18
So here we get 15 to 4 is 200, 150 to 8 is 1200, 250 to 9 is 2 ,250, 250.
00:34
350 into 10 is 3500, 450 into 7 is 3 ,150 515 to 5 is 2 ,750, 650 into 4 is 2 ,600 and 750 750 into 5 is 2 ,250 and the summation of f5 xi xi is 17 ,900 the summation of f5 xi is 17 ,900 the the summation of fi is 50 and we know that mean is equals to 1 upon n sigma f i x i goes from 1 to n by substituting the known values we get mean which is equals to 1 upon 50 into 17 ,900.
01:54
It would be equals to 358.
02:01
Now for the mean deviation, first of all we will find the absolute value of deviation from the mean.
02:10
So here we have xi minus 358.
02:18
Here we get 50 minus 358 would be equals to 308.
02:27
Since we are finding the absolute deviation so we will ignore the minus sign.
02:33
Now here we get 150 minus 358 as 208.
02:40
Further we get 250 minus 358 is 108.
02:47
Here we get 350 minus 358 is 8.
02:52
Now we have 450 minus 358 is 92...