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Shape of Distributions
N/A
6
Psychology
Undergraduate 1
05/29/2014

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Cards

Term
Parametric data
Definition
All normal distributions have same characteristics so can be generalized.
Term
SKEWNESS
Definition
Symmetry
POSITIVE: tail at higher values.
Mean and median higher than mode.
Mode (most scores) at lower value.

NEGATIVE: tail at lower values.
Mean/median lower than mode
Mode (most scores) at higher values.
Term
KURTOSIS
Definition
Steepness.
LEPTOKURTIC: steep- +ve value
MESOKURTIC: normal- 0 value
PLATYKURTIC: flat- -ve value
Term
Cumulative frequency
Definition
Frequencies accumulate
Can be given as numbers/percentages.
Term
PERCENTILE
Definition
Categorisation of frequencies
Score which a given % of scores are equal or less than.
Term
Perfect Normal Distribution
Definition
Mean=Median=Mode
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