would i have to use the formula and chart for this?

Question

anonymous · Answer

attachment

agent0smith · Answer

This might help find the variance http://www.mathsisfun.com/data/standard-deviation.html

anonymous · Answer

so i square each, then add, then divide by the number of numbers?
and that= the varience?

anonymous · Answer

@agent0smith

anonymous · Answer

@zzr0ck3r ?

agent0smith · Answer

Not quite:

To calculate the variance follow these steps:

Work out the Mean (the simple average of the numbers)
Then for each number: subtract the Mean and square the result (the squared difference).
Then work out the average of those squared differences.

anonymous · Answer

so can you show me the first one?
squared all them seperatly, is that wrong?

agent0smith · Answer

For each number, subtract the mean. 

Square that number.

Add them all together.

anonymous · Answer

so like 35-mean?
the mean of all the numbers?

agent0smith · Answer

Yep. Find the mean first, then subtract it from each number.

anonymous · Answer

i got 50.3333333 for the mean...

anonymous · Answer

so 35-50.333333?
etc.

anonymous · Answer

is there a way to just plug it all into a graphing calculator?

agent0smith · Answer

so 35-50.333333?
yes. For each number. Then square each result, and add them all together.

Probably, variance is pretty tedious.

anonymous · Answer

ok, then what

anonymous · Answer

??

anonymous · Answer

@agent0smith

agent0smith · Answer

After you've added them all together, divide by how many data points are in the original sample.