Descriptive Statistics (AQA A-Level Psychology): Flashcards
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Practise the cards
10 cards from this deck
Purpose of descriptive statistics
Purpose of descriptive statistics
Summarise and present large datasets in meaningful ways
Definition of the median
Definition of the median
The middle value when all scores are arranged in order
Definition of the mean
Definition of the mean
Average - add all scores and divide by total number of values
Definition of the mode
Definition of the mode
The most frequently occurring value in a dataset
Definition of the range
Definition of the range
Difference between the highest and lowest values
What standard deviation measures
What standard deviation measures
How far, on average, scores deviate from the mean
Key advantage of the median
Key advantage of the median
Robust against outliers - extreme scores don't distort result
Key advantage of the mean
Key advantage of the mean
Most precise - incorporates every single data point
Bar charts vs histograms difference
Bar charts vs histograms difference
Bar charts: categorical, spaces; histograms: continuous, no spaces
Range of correlation coefficients
Range of correlation coefficients
+1 (perfect positive) to -1 (perfect negative)