00:01
The question says a random sample was taken on the thickness of insulation in transformer winding and the following thickness.
00:10
So here it's given random sample.
00:19
So first of all i have to find the mean median and mode of this on group data.
00:25
So here mean will be mean is 39 .16 median is 38 and and and mod is 38.
00:42
Now the next, make of frequency table for this data starting at lower class limit of 20 and with a class with the class size of 15.
00:51
So this will be, this is the second part, lower given, upper given class with 5.
00:57
It is midpoint and it is frequency.
01:01
Now coming to third part of this question, which is saying that from the constructed frequency distribution, find the mean median mode variance and standard deviations.
01:13
So it will be, so median will be, mean is already given median 35 plus 5 by 27, 50 minus 29 which is equal to 38 .889.
01:32
Now for mode, the model class is 35 to 40 since the frequency is maximum.
01:38
So mod is equal to 35.
01:42
Plus 5 multiplied by 27 minus 12 divided by 2 multiply by 7 minus 12 minus 18.
01:51
So this is equal to 36 .25.
01:56
Variance is equal to variance will come as 98 .0275 and in standard deviation, square root of 98 .075 is equal to 9 .5 is equal to 9...