00:01
So here we have like the data which measures the number of hurricanes that occur each year in a certain region.
00:09
And we need to compute first some information.
00:12
We need to compute the range.
00:14
And the range here is given by the difference between the maximum number of hurricanes that we have in the sample minus the minimum.
00:24
So basically we have a 20 as the maximum number and one as the number.
00:30
The minimum.
00:30
So this means that the range is 19 hurricanes.
00:36
Now, for the other part, we need to compute the mean and also the standard deviation.
00:43
So the mean basically is given by the sum of all the values that we have in the sample, divided by the total number of observations that we have in the sample as well.
00:57
So basically, if you sum all the observations that we have, and then you just divide this by the total number in this case of observations.
01:08
We are going to get in the end in this case that the mean here is 12 .242 hurricanes.
01:25
So basically we have like again the mean is just the sum of all the observations that we have.
01:32
So in this case, we have here 14 observations.
01:38
So we're just going to sum off all the observations that we have, and then divide by the simple size, which is 14.
01:47
So this will give us the mean.
01:49
Now the state deviation has another formula.
01:52
It's given by the square root of.
01:55
For each value that we have, starting with 11, we need to subtract the mean that we just have just calculated.
02:02
And then compute a square of this difference for all the observations that we have.
02:07
So the last one is 13.
02:09
So you just need put here like a 21, 42 square.
02:14
And after you are done like for all the observations you need to divide this by the total number of observations minus 1, which is 13...