What is the STD for 66, 105, 132, 129, 60, 64?
I can't understand how to get it

Question

What is the STD for 66, 105, 132, 129, 60, 64?
I can't understand how to get it

-studywith- · Answer

STD:
1. Work out the Mean (the simple average of the numbers)
2. Then for each number: subtract the Mean and square the result.
3. Then work out the mean of those squared differences.
4. Take the square root of that and we are done!

Simple, right?

phi · Answer

can you find the average of those numbers?

-studywith- · Answer

Oh hi, the conversation is continued here: http://openstudy.com/study#/updates/578c2265e4b0e14e8e15aa1b

-studywith- · Answer

*lecture

-studywith- · Answer

*cough*

skyepurple1997 · Answer

I did what you said @-StudyWith- but I got it wrong

skyepurple1997 · Answer

The average is 92.7

mww · Answer

There is a formula for standard deviation here: http://dsearls.org/courses/M120Concepts/ClassNotes/Statistics/StandardDeviation2a.gif However I'd just use the calculator in statistics mode to enter the data and have it done for you. Just be aware there are two formulas for it, the one above is population std deviation but there is a similar formula for sample standard deviation (which divides by n - 1 rather than n)