00:02
So the table on the screen shows the given data.
00:08
We have to calculate the sample mean, median, variance, standard deviation of energy uses.
00:15
And for part b, we have to construct the histogram of the energy uses data.
00:22
So coming to part a, we have the sample size.
00:30
N is equals to 90.
00:35
We calculate mean, let x denote the sample data points.
00:42
Sample data points, right? so mean is equals to x bar which is equals to 1 divided by n submission over i from 1 to 90 x i that is summing all these 90 values and dividing it by 90 we get this is equals to 10 .0384, the required mean.
01:22
Coming to the variance.
01:31
So variance is equals to s square.
01:37
The formula for the same is 1 divided by n minus 1.
01:42
Summission x i minus x bar whole square, summation over i from 1 to 90...