Histograms and frequency polygons (Edexcel GCSE Statistics): Flashcards
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Midpoint of 110≤h<120?
Midpoint of 110≤h<120?
115
Cumulative freq up to 6m if 4-5:5,5-6:8?
Cumulative freq up to 6m if 4-5:5,5-6:8?
13
How to make frequency polygon from histogram?
How to make frequency polygon from histogram?
Plot midpoints and join with straight lines
Why no gaps between histogram bars?
Why no gaps between histogram bars?
Shows continuous data; intervals touch
Cumulative freq up to 6m if 4-5m:5 and 5-6m:8?
Cumulative freq up to 6m if 4-5m:5 and 5-6m:8?
13
How to draw bars for equal class intervals?
How to draw bars for equal class intervals?
Equal widths, no gaps; height = frequency
How to close a frequency polygon?
How to close a frequency polygon?
Start and end on x-axis at class boundaries
Find cumulative frequency up to 6m (4-5:5,5-6:8)
Find cumulative frequency up to 6m (4-5:5,5-6:8)
13 (5 + 8)
Midpoint and plot for 130≤h<140, freq 16
Midpoint and plot for 130≤h<140, freq 16
Midpoint 135; plot point (135,16)