Histograms and frequency polygons (AQA GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What is a key feature of histograms?
What is a key feature of histograms?
No gaps between bars unless zero frequency.
How do you calculate cumulative frequency?
How do you calculate cumulative frequency?
Add frequencies together progressively.
What axis is frequency plotted on in histograms?
What axis is frequency plotted on in histograms?
Frequency is plotted on the vertical axis (y-axis).
How do you find midpoints for frequency polygons?
How do you find midpoints for frequency polygons?
Midpoint = (lower + upper) ÷ 2 for each interval.
What should you check for equal class intervals?
What should you check for equal class intervals?
Ensure all bars have equal width if intervals are equal.
What is the first step in drawing a histogram?
What is the first step in drawing a histogram?
Set up your axes: horizontal for data, vertical for frequency.
What is a benefit of frequency polygons?
What is a benefit of frequency polygons?
Easier to compare different data sets visually.
What common mistake to avoid in histograms?
What common mistake to avoid in histograms?
Do not draw gaps between bars for continuous data.
How do you plot a frequency polygon?
How do you plot a frequency polygon?
Join midpoints of histogram bar tops with straight lines.
What should you always label in your graphs?
What should you always label in your graphs?
Label axes clearly with appropriate units.