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TI-Nspire™
TI-Nspire™ CAS

3.6

Statistics: Histograms

by Texas Instruments

Objectives

• Students will analyze data represented in a histogram.
• Students will recognize that changing class width (bin width) and/or alignment affects the shape and spread of a distribution in a histogram.
• Students will interpret histograms displayed with frequency, percent, and density on the vertical axis.

Vocabulary

• class alignment/bin alignment
• class width/bin width
• density
• frequency
• histogram
• relative frequency
• skew (right or left)
• symmetric

About the Lesson

This lesson involves the interpretation of different types of histograms: frequency histograms, relative frequency histograms, and density histograms.

As a result, students will:

• Hover over a class/bin to determine the number of observations in that class/bin.
• Change the class/bin width by dragging the edge of the class.
• Compare the histograms with different settings including class/bin width, class/bin alignment, and y-scales.