00:01
Here the weights before and the weights after is given.
00:06
So the weights before is represented with x and the values are 180, 195, 177, 221, 208 and 199.
00:20
The y values are 183, 187, 161, 197 and 189.
00:33
The difference between these two values that is xi minus yi is considered or calculated which is obtained as minus 3, 8, 16, 17, 11 and 10.
00:50
Now we have to calculate the mean of these deviations that is d bar is to be calculated which is given by the formula 1 by n sum of d i's that is 1 by 6 and the sum of the deviations is 59.
01:07
So 59 by 6, 9 .833 is the mean of the deviations.
01:14
Now variance of these deviations is to be calculated which is given by the formula 1 by n summation of d i minus d bar the whole square...