Mean, Standarad Deviations, and Variances

Use measures of variance to compare and analyze data sets. Pupils match histograms of data sets to their respective statistical measures. They then use calculated statistics to further analyze groups of data and use the results to make...

Double the fun — calculate two measures of deviation. The lesson plan provides information to lead the class through the process of calculating the mean absolute deviation and the standard deviation of a data set. After learning how to...

Wouldn't life be easier if a computer would do the work for us? A video shows how to use Excel to solve for standard deviation, mean, and variance statistics. 

Continuing his conversation about data sets from the previous video, Sal introduces range, variance, and standard deviation as means of dispersion. Those advancing in algebra or beginning a statistics class will benefit from Sal's clear...

What if math teachers are really pirates and they want us to find x so they can get the buried treasure? A short video explains how to calculate standard deviation and variance with a step-by-step guided practice problem. The...

Good news! We only have a half day of school this morning. Granted, we have the other half this afternoon. The video is a visual representation of the definitions of mean and standard deviation. 

Don't be mean, be above average. A straightforward video explains why degrees of freedom are used and how to recognize the error based on your sample population. 

Excel at your work with a lesson featuring spreadsheets. A video walks pupils slowly through how to solve standard deviation and variance using Excel in two different ways. 

Use variable value sliders to understand variance. The interactive shows four whole numbers, their mean and deviation. Using the information, pupils find the variance of the numbers and respond to question related to the understanding of...

Is baseball really the road to riches? Here, statisticians look at salary data from baseball players and use variance to measure the spread of the data to more accurately answer that question. Note: The salary data provided is from 1994,...