0,73,93,165,193,199,229,234,240,245,257,268,332,380,385

I need the range formula and how to

the variance formula and how to

And the deviation formula and how to

## Your answer

 Your name to display (optional): Email me at this address if my answer is selected or commented on: Privacy: Your email address will only be used for sending these notifications. Anti-spam verification: To avoid this verification in future, please log in or register.

## 1 Answer

The range is the difference between the highest and lowest data: 385-0=385.

To find the variance first find the average (mean) of all the data. Add the data values together and then divide by the amount of data (15 in this case): 3293/15=219.53.

We subtract the mean from each datum in the set and square the result. Then we add together all of these and divide by 15: 10711.58 (approx). Another way to do this is to add up all the squares of the data, divide the result by 15, then subtract the square of the mean.

We take the square root of this variance to get the standard deviation: 103.50 (approx).

by Top Rated User (680k points)

2 answers
1 answer
1 answer
2 answers
0 answers
1 answer
1 answer
1 answer
1 answer
1 answer