Login

Contact Jeff

Email Updates
About
Stats Q&A
Calculators
Tutorials
Products
Home
View All Tutorials
The Standard Deviation :: Measuring the Average Distance to the Mean
Things to remember:
The
range
is the maximum minus the minimum value.
You can't just take the average distance to the mean: negatives and positives cancel each other out.
Converting the negatives to positives and then taking the average is the MAD:
mean absolute deviation
not used frequently.
Squaring the distances to the mean then taking the average provides the
variance.
An important measure used often, just not easy to interpret.
Taking the square root of the variance provides the
standard deviation
.
View All Tutorials
How well did you understand this lesson?
Avg. Rating 7.89 (80)
Not at all
Neutral
Extremely
0
1
2
3
4
5
6
7
8
9
10
What didn't make sense?
Name
Email
Not Published
Comment
To prevent comment spam, please answer the following question before submitting (tags not permitted) :
What is 5 + 1:
(enter the number)
May 13, 2014  Larry Chuck wrote:
Wut?
September 3, 2010  Tom wrote:
Flash movie is not playing for me. :(
June 8, 2009  ashish jain wrote:
amazing amazing
May 5, 2009  Stephanie Christians wrote:
Woohoo! I now finally understand the difference b/t the variance and the standard deviation! Thank you!