McGraw Hill
Glencoe: Online Study Tool: Quiz on Measures of Variability
Students demonstrate advanced mathematics skills with this online quiz. The questions check understanding on measures of variability. Topics include variance, standard deviation, and frequency tables.
CK-12 Foundation
Ck 12: Statistics: Applications of Variance and Standard Deviation
[Free Registration/Login may be required to access all resource tools.] Calculate the variance and standard deviation of a data set.
CK-12 Foundation
Ck 12: Statistics: Tests of Single Variance
[Free Registration/Login may be required to access all resource tools.] This Concept introduces students to testing variance using the chi-square distribution as well as creating a confidence interval for the variance.
CK-12 Foundation
Ck 12: Statistics: Variance of a Data Set
[Free Registration/Login may be required to access all resource tools.] Covers the variance for a normally distributed random variable.
Math Is Fun
Math Is Fun: Standard Deviation and Variance
Standard devaition and variance are explained clearly, accompanied by an examples using the size of dogs.
Other
Vlps: Mean and Standard Deviation
Explanation of frequency distributions, mean, standard deviations, and variance including a Java Applet.
Michigan Technological University
Computing Mean, Variance and Standard Deviation
Page centered around a computer program to determine mean, variance, and standard deviation.
University of Illinois
University of Illinois: Mste: How Much Do Baseball Players Really Make?
An interesting real-world use of statistical variance and standard deviation to help dispell the common perception that all major league baseball players are paid millions of dollars and are not worth it. The lesson plan gives specific...
Texas Instruments
Texas Instruments: Spread Out #1
This exploration uses baseball's slugging average to explore variance and standard deviation.
CK-12 Foundation
Ck 12: Statistics: Measures of Spread/dispersion Grades 11 12
[Free Registration/Login may be required to access all resource tools.] This Concept introduces students to the some of the measures of spread commonly used, such as range, standard deviation and variance.
CK-12 Foundation
Ck 12: Probability: Empirical Rule
[Free Registration/Login may be required to access all resource tools.] Use percentages associated with normal distributions to solve problems.
Palomar Community College District
Palomar College: Behavioral Science Statistics: Variance and Standard Deviation
A series of step-by-step worked problems demonstrating how to take a set of data and produce the variance and standard. Hints are provided along the way and the final measures are shown for the user to check.
Shodor Education Foundation
Shodor Interactivate: Measures
Enter data and view the mean, median, variance, and standard deviation of the data set.
Hofstra University
Hofstra University: Review Exercises Random Variables..
Interactive review problems are offered to practice the concepts of random variables and statistics. Topics covered include, Bernoulli trials, normal and binomial distributions, Chebyshev's rule, and the like.
University of Illinois
University of Illinois: Introduction to Descriptive Statistics
A series of explanations of statistics terms based on the statistics from a dice game.
Other
Dispersion
This site discusses the range, average deviation, variance, and standard deviation, as well as their relation to dispersion.
Other
Fayetteville State Univ.: Variance & Standard Deviation
Quick definitions of these statistical terms are provided, then followed by an example covering both of them. This page is part of a larger series which gives simple explanations of common, useful statistical concepts.
Other
Fayetteville State Univ.: Analysis of Variance (Anova)
A brief discussion of ANOVA, statistical Analysis of Variance, where the variability between two conditions is observed. An example is provided to assist the user in understanding.
National Institute of Standards and Technology (NIST)
Uncertainty of Measurement Results
A heavily mathematical discussion by the National Institute of Standards & Technology, attempting to quantize uncertainty.
National Council of Teachers of Mathematics
The Math Forum: Understanding Standard Deviation
MathForum answers a question on variance and standard deviation.
Interactive Mathematics
Interactive Mathematics: Probability Distribution
The concept of random variables is the focus of this lesson, including definitions of discrete and continuous random variables. Discussions on discrete probability distribution and density function are included, along with expected value...
University of Illinois
University of Illinois: Spreading It Thick
Resource contains the definition for variance. It also shows students how to calculate the variance. There is a link to a bar graph that displays variance for the data example.
Other
Meta Calculator: Statistics Calculator
A web-based statistics calculator to find mean, median, standard deviation, variance and ranges.
University of Glasgow
Steps Statistics Glossary: Random Variables and Probability Distributions
This section of the Statistics Glossary offers definitions of terms having to do with random variables and probability distributions such as expected value and normal distribution.