Download these free worksheets to sharpen your skills with statistics and probability. Sheets focus on collecting and organizing data, measures of central tendency (mean, median, mode, and range), and probability.

"The goal of this lesson plan is to introduce the concepts of mean, median and mode and to develop understanding and familiarity with these ideas." This lesson plan is provided by Shodor Education Foundation.

PlopIt allows users to build dot plots of data using the mouse. View how the mean, median, and mode change as entries are added to the plot.

Calculate basic summary statistics for a sample or population data set including minimum, maximum, range, sum, count, mean, median, mode, standard deviation and variance.

Provides lengthy explanations of the measures of central tendency - mean, mode, and median - and the measures of variability - range, variance, standard deviation. Graphs of interesting examples are presented as well, skewed...

This lesson plan introduces quartiles and box plots. It contains an activity and discussion. Supplemental activities about how students can represent data graphically are also included.

The resource from Khan Academy provides practice questions for the Praxis Core Math Test. This section reviews probability and statistics questions connected to the center and spread of data in a collection.