00:01
There are seven questions given here, seven numbers given here.
00:04
We have to complete the mean and the standard division of this sample.
00:07
So for the first one, the mean, which is the sum of the values and divided by the number of terms or the numbers here, which is 5 plus 0 plus 4 plus 5 plus 1 plus 2 plus 4.
00:22
And this is divided by the seven numbers, which is this is 9, 14, sorry, this is 5, 14, 15, 17, and 21, 21 over 7, which is equal to 3.
00:33
This is the mean.
00:35
And what about for the standard division? standard division has the formula, which is the square of, the sum of xi minus.
00:42
Let's say the mean value is denoted by x bar here.
00:45
And since this is a sample, this is going to divide it by n minus 1 here.
00:49
So the standard division divided by sigma here, sorry, denoted by sigma here.
00:54
So the first one, which is 5 minus 3 squared, and plus 0 minus 3 squared plus 4 minus 3 squared, and plus 5 minus 3 squared and plus 1 minus 3 squared plus 2 minus 3 squared, and the last one which is 4 minus 3 squared.
01:12
And this is divided by, there are seven numbers, which is 7 minus 1 here.
01:16
So let me just compare the value here.
01:18
So they complete the value here, which is 4 plus 9 plus 1 plus 4 and plus 4 and plus 1 and plus 1 here.
01:27
This is divided by 7, which is equal to.
01:30
This is 13, 14, 18, 22 and 24.
01:36
So this is square root of 24 over 7, which is this is the square root of 24 over 7, which is equal to 1 .85.
01:47
Life.
01:48
This is the standard division.
01:49
This is divided by six.
01:51
Let me just make the correction here, which is equal to two here...