...Beauty, cleaning, DIY tips and more - free to join!
   Login   Contact us   Site map   Puzzle Club   Ask a question    Newsletter

Can you explain Standard Deviation please.

7, 9, 5, 7, 6, 8, 7, 11.
Question asked by: Stinkabell

Asked on: 28 Dec 2008

This number tells you how a set of numbers vary with regard to the mean.

For instance if you have the numbers 1, 2, 2, 3 then you first find the mean, which here is 2.

We then find how each deviates from the mean,
e.g. 1 - 2, 2 - 2, 2 - 2, 3 - 2

and square each of these, to get 1,0,0,1.

Then find the mean of these, which is 0.5. The square root of this is the standard deviation (g here 0.707).

Now just apply the above steps to your numbers to get the standard deviation in that case.

By: knowitall
Replied at: 04 Jan 2009
Rate Answer
Comment or provide your answer to this question
No comments have been added to this question "Can you explain Standard Deviation please.".
Ask a New Question

Find out more about Maths

Maths Questions and Answers

probability Questions and Answers

Next question: Given that y is inversely proportional to (x-1). (a)write down an expression for y in terms of x and a constant k. (b)it is given that y=5 when x=3. find x when y=25.

Become a Member! It's Free >>>

Share on Facebook: On Twitter: TwitterTweet this!

Question Keywords

please  deviation  standard  explain  

More Questions:

Fractional Equations
Maths Algebra Help Required
Number Selection Probability
Complete The Sequence
Percentages - Tried Using Formula..answer Doesn't Make Sense