Curated OER
Histograms and Bar Graphs
Students are introduced to histograms, bar graphs, and the concept of class interval. They use an activity and three discussions with supplemental exercises to help students explore how data can be graphically represented (and...
Math Is Fun
Math Is Fun: Histograms
Explains, with examples, what a histogram is, how it differs from a bar graph, and how to interpret one. Includes a set of practice questions.
Mangahigh
Mangahigh: Data: Find the Class Interval Containing the Mode
Students watch an online tutorial on the concept of finding mode from a frequency table. After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based on their answers.
Mangahigh
Mangahigh: Data: Find the Class Interval Containing the Median
Students watch an online tutorial on the concept of finding the median. After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based on their answers.
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.