00:01
For this question, there are given 17 numbers, and in the first part, we have to find the range.
00:08
So for part a, what is the formula for the range, which is the maximum value minus the minimum value? so when we'll look at the data say, the maximum value here is 70, right? and the minimum value, let me just observe, and we have 8, right.
00:25
So the range is 62.
00:27
This is the answer.
00:28
And we also have to find the variance and the standard division here.
00:34
So let's remember the formula for the variance, which is equal to the sum of the values.
00:41
So we have to subtract the mean value, the mean value for each of the value and take the score of this one.
00:49
Since it's a sample, i'm going to just divide this number by n -minus 1 here.
00:55
So in this case, where the x -bar is the mean score.
01:01
And the n is the sample size, which is 17 in this case.
01:05
Okay, let me just do this calculation here.
01:07
First of all, i need to get the x bar here.
01:10
So the x bar, which is the sum of values divided by the sample size.
01:14
So the x bar that is equal to...