Monday, 11 July 2011

histogram (bar chart) tool - Illuminations (NCTM)

Illuminations histogram tool

6 data sets given, or you can enter your own data

it is very helpful to be able to explore the shape of the distribution for various groups sizes (using a lovely slider)

students can consider the number of bars necessary to provide a view of the overall data shape

for example, in the 'horsepower' example above, a distribution with a further peak (as well as the modal class) gets smoothed out for fewer 'bins'

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