Statistical Skills (AQA A-Level Geography): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
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Practise the cards
10 cards from this deck
Central tendency measures
Central tendency measures
Describe the centre/typical value of a dataset
Measures of dispersion
Measures of dispersion
Show how spread out data values are
Arithmetic mean formula
Arithmetic mean formula
x̄ = ΣX/N (sum of values ÷ number of values)
Mode definition
Mode definition
Value that appears most frequently in dataset
Median definition
Median definition
Middle value when data is arranged in order
Range calculation
Range calculation
Highest value - Lowest value
Inter-quartile range (IQR)
Inter-quartile range (IQR)
Spread of middle 50% of data around median
Standard deviation measures
Standard deviation measures
How spread out values are from the mean
Range limitation
Range limitation
Influenced by extreme values/outliers
Large standard deviation means
Large standard deviation means
Data values widely spread from mean