Posted by **Anna** on Saturday, January 9, 2010 at 12:13pm.

I need to know the standard deviation and how to get it for the following set of numbers. {10, 11, 10, 12, 11, 10, 11, 11, 12, 13, 11, 10, 14}

- Math -
**Marth**, Saturday, January 9, 2010 at 4:09pm
The standard deviation is the sqrt(sum(mean - i)^2 / (n-1)), where i takes on the value of each element in the set, and n is the number of elements in the set.

Start by finding the mean. Then for each element in the set, find the difference from the mean and square it. Find the sum of those differences, divide it by (n-1), and take the square root.

- Math -
**PsyDAG**, Sunday, January 10, 2010 at 5:57pm
In case you didn't understand Marth's directions, you need to find the sum of those **squared** differences.

Since the mean of any distribution is a fulcrum, the sum of the differences of individual scores from the mean always = 0.

I hope this helps a little more.

## Answer this Question

## Related Questions

math - find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16...

standard deviation - if the standard deviation of a set of n numbers is y what ...

math - find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16...

Math - {-1, 0, 1, 2, -1, 0, 1, 2, -1, 0, 1, 2, 1, 1, -2} I need to find the ...

Stats - You are allowed to choose four whole numbers from 1 to 10 (including 1 ...

math - You are given the following: there are 27 pieces of data mean is 60 ...

college math - 20. Calculate the range, variance, and standard deviation of the ...

math - hi i need help calculating the standard error using the central limit ...

Math - Roughly speaking, the standard deviation indicates how far, on average, ...

HELPP math - 13,14,29,26,41,53,60,7,89,14 Based on the numbers above what is the...