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Descriptive and inferential statistics
Which statistic to use?



DESCRIPTIVE STATISTICS
Measures of central tendency; informs us about central (middle) values for a set of data.
They are averages ­ ways of calculating a typical value for a set of data.
An average can be calculated in different ways:

MEAN: adding…

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INFERENTIAL STATISTICS
Inferential tests require time and patience but they are the only way to determine whether the
results of a study are significant i.e. a real effect has been demonstrated as opposed to a chance
pattern that looks meaningful.
When deciding which test is appropriate in any situation, you…

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