Log-in | Contact Jeff | Email Updates
 
Standard Deviation in Practice
Home Introduction to the Standard Deviation Why do you need a measure of Variability? Measuring the Average Distance to the Mean Variability Quiz Population versus Sample Standard Deviation Standard Deviation Calculation Standard Deviation Calculation Short-Cut Method The Standard Deviation with Excel and The Online Calculator Standard Deviation in Practice Standard Deviation QuizView All Tutorials
The Standard Deviation :: Standard Deviation Quiz
5 Questions Total
StartFinish
You are 0% Complete

If you have the variance, how do you get the standard deviation?












 
Standard Deviation in Practice
Home Introduction to the Standard Deviation Why do you need a measure of Variability? Measuring the Average Distance to the Mean Variability Quiz Population versus Sample Standard Deviation Standard Deviation Calculation Standard Deviation Calculation Short-Cut Method The Standard Deviation with Excel and The Online Calculator Standard Deviation in Practice Standard Deviation QuizView All Tutorials

How well did you understand this lesson?

Avg. Rating 7.77 (547)

Not at all    Neutral    Extremely
012345678910

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 4 + 4: (enter the number)
April 17, 2016 | Yasser wrote:
set [4,10,12,2,15,5] mean = 48/6 = 8 variance = [(4-8)^2 + (10-8)^2 + (12-8)^2 + (2-8)^2 + (15-8)^2 + (5-8)^2] / n-1 so variance = 130 / 5 = 26 std. dev = sqrt of variance so sqrt of 26 = 5.099
 
September 22, 2015 | Noah Krause wrote:
I still don't get it
 
November 22, 2014 | Kristen wrote:
I had a hard time understanding how you interpret the differences between samples Or at least understanding how to do so outside of the examples given.
 
May 8, 2009 | JQ wrote:
On the questions at the end, when you ask us to calculate the standard deviation, you don't specify whether it is sample or population. If I am just given a small set of numbers, rather than told I have a sample drawn from a larger population, shouldn't I assume that that set is the complete set, and therefore use population SD?