Khan Academy
Khan Academy: Standard Deviation of a Population
Calculate the standard deviation of a population. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: S Id Sat Scores
Students will find solutions for a series of questions based on the assumption that SAT mathematics scores for a particular year are approximately normally distributed with a mean of 510 and a standard deviation of 100. Explanation and...
Illustrative Mathematics
Illustrative Mathematics: Understanding the Standard Deviation
The purpose of this task is to deepen student understanding of the standard deviation as a measure of variability in data distribution. The task is divided into four parts, each of which asks students to think about standard deviation in...
Other
Magoosh: Statistics Fundamentals
An online course on the fundamentals of statistics including video lessons in Mean, Median, and Mode; Weighted Averages; Quartiles and Boxplots; Range and Standard Deviation; Normal Distribution; Z-scores; Intro to Inferential...
Purple Math
Purplemath: Mean, Median, Mode, and Range
Mean, median, and mode are three kinds of "averages". The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers. The "median" is the "middle" value in the list of numbers. To...
CK-12 Foundation
Ck 12: Statistics: Standard Deviation of a Normal Distribution
[Free Registration/Login may be required to access all resource tools.] Learn about the spread of a normal distribution.
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: Statistics: Sampling Distributions
[Free Registration/Login may be required to access all resource tools.] This concept introduces the sampling distribution of the mean, inferring the population mean from samples and sampling error.
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.
CK-12 Foundation
Ck 12: Mean and Standard Deviation of Discrete Random Variables
[Free Registration/Login may be required to access all resource tools.] This Concept teaches students how to find the mean and standard deviation for discrete random variables.
CK-12 Foundation
Ck 12: Statistics: Standard Deviation of a Data Set
[Free Registration/Login may be required to access all resource tools.] Learn about standard deviation of normally distributed data.
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.
National Council of Teachers of Mathematics
Nctm: Illuminations: Mean and Median
This applet allows the user to investigate the mean, median, and box-and-whisker plot for a set of data that they create.
Shodor Education Foundation
Shodor Interactivate: Measures
Enter data and view the mean, median, variance, and standard deviation of the data set.
Shodor Education Foundation
Shodor Interactivate: Skew Distribution
Change the median and standard deviation of an automatically generated normal distribution to create a skewed distribution, allowing you to observe properties like what it means for the mean, median, and mode to be different.
Shodor Education Foundation
Shodor Interactivate: Normal Distribution
Change the standard deviation of an automatically generated normal distribution to create a new histogram. Observe how well the histogram fits the curve, and how areas under the curve correspond to the number of trials.
Khan Academy
Khan Academy: Standard Deviation of a Population
Calculate the standard deviation of a population.
CK-12 Foundation
Ck 12: Algebra Ii: 5.5 Sampling Variability
This section explores the concept of sampling variability in the sample proportion. It will address the effect on the mean and standard deviation of a sample distribution as the sampling size changes.
CK-12 Foundation
Ck 12: Algebra Ii: 6.3 Z Scores
See how Z-scores are related to the Empirical Rule from the standpoint of being a method of evaluating how extreme a particular value is in a given set.
CK-12 Foundation
Ck 12: Algebra Ii: 5.4 Standard Deviation
Explore what the standard deviation is as it relates to the graph of a normal distribution curve.
Khan Academy
Khan Academy: Normal Distributions Review
Normal distributions come up time and time again in statistics. A normal distribution has some interesting properties: it has a bell shape, the mean and median are equal, and 68% of the data falls within 1 standard deviation.
Other
Berrie's Statistics Page: Graph of Normal Distribution
Explanation of the Normal Curve and the importance of the normal distribution
Other
Dispersion
This site discusses the range, average deviation, variance, and standard deviation, as well as their relation to dispersion.
Other
James Wright: Measures of Central Tendency
This site looks at measures of central tendency and dispersion. Discussed are topics such as standard deviation, mean, median, and mode.