00:01
Hello students, in this question we have to find out the mean and median values.
00:04
So these are class intervals and these are frequencies.
00:07
Mid value is, we can find out the mid value.
00:11
Here the mid value is, mid value equal to 0 plus 10 by 2.
00:19
That is 5.
00:21
Like that 10 plus 20 by 2 equal to 50.
00:26
Like that we calculate the mid values here.
00:29
D equal to x minus a by h.
00:32
It is x minus 55 by 10.
00:35
So we get minus 5, minus 4, minus 3, minus 2, minus 1.
00:39
Like that here we have to multiply the f column and d column.
00:43
This is f column frequency.
00:46
So f into minus 5 is minus 30.
00:48
8 into minus 4 minus 32.
00:51
Here the class frequency is 6.
00:53
So here the value is 6.
00:55
6 plus 8 is 14.
00:58
14 plus 5 is 19.
01:01
19 plus 12 is 31.
01:03
31 plus 10 is 41.
01:05
41 plus 50 is 56.
01:08
Like that we find out the cf column.
01:13
And now we have to find out the mean.
01:16
So here we know that the formula for mean is mean equal to mean equal to a plus summation fd by n into h.
01:30
So we have to plug the values here.
01:33
Mean equal to mean equal to 55 plus minus 48 by 84 into 10.
01:43
So here 55 minus 5 .7143...