Histograms and area keys (Edexcel GCSE Statistics): Flashcards
📚Flashcards
Practise the cards
7 cards from this deck
ShowHide
Practise the cards
7 cards from this deck
How do you find the frequency in histograms with unequal class widths?
How do you find the frequency in histograms with unequal class widths?
Frequency = Density imes Class width.
In the example, what does 1 small square represent?
In the example, what does 1 small square represent?
4 people (area key: 4 per square).
What is the key formula for histograms & area keys?
What is the key formula for histograms & area keys?
Frequency = Density imes Class width.
Formula: freq, fd & class width?
Formula: freq, fd & class width?
Frequency = frequency density × class width
Unequal widths: which method?
Unequal widths: which method?
Use area key or fd×class width
Use area key: 1 square=4, 10 sq find freq
Use area key: 1 square=4, 10 sq find freq
40 (10 squares ×4=40)
Area key: 1 sq=4 ppl. Bar has 10 sq. Freq?
Area key: 1 sq=4 ppl. Bar has 10 sq. Freq?
40