00:01
So it says here the following data gives the number of patients who visited a walk -in clinic on each of the 20 randomly selected days.
00:09
Calculate the range variance in standard deviation for these data.
00:14
So for the range, you're going to take the smallest number and subtract the lot from the largest number.
00:25
So 38 minus 20 is 18.
00:30
Then you have the standard deviation.
00:35
I'm just going to label sd.
00:37
And, or actually, let me list the mean first.
00:43
So to find the mean, you have to add up all of the numbers and divide by however many numbers that there are.
00:50
There's 20 numbers.
00:52
And so the mean i got is 29 .85.
00:58
And the amount of numbers is 20.
01:04
So what i did was i took, let's see, i took 597 because that was the total divided by 20 to get 29 .85.
01:20
And then from there i found the standard deviation and the standard deviation is the distance, the average of the distances from the mean.
01:28
And so it's 6 .7533617...