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Histograms, frequency density, cumulative frequency and box plots

Edit class frequencies and unequal class boundaries to see why bar height is frequency density (frequency ÷ class width), estimate frequencies from partial bars, and view the matching cumulative frequency curve and box plot.

Estimate frequency from part of a bar (drag cut-offs or use sliders)

Lower cut-off time 15 min

Upper cut-off time 40 min

Histograms, frequency density, cumulative frequency and box plots

Estimate frequency from part of a bar (drag cut-offs or use sliders)

Edit class frequencies and internal boundaries (0 to 60 min)

Grouped data table (frequency density = frequency ÷ class width)