Inferential statistics

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4 Terms

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What are inferential statistics used for?

Used to statistically test hypotheses

Choice of test depends on DDD (Design, Difference, Data)

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Design

  • Independent (unrelated)

  • Repeated (related)

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Difference

  • Difference: is there a difference between IQ in males/females. children/adults, singers/pianists, reader/writers etc

  • Correlation: is there a relationship between IQ and age, number of hours reading a week

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Data

  • Nominal: HOW MANY, categorical, normally counted using a tally, e.g. colours, types of fruit, ethnicity

  • Ordinal: values with an order or rank (think scales), satisfactions ratings, test scores, agreement level

  • Interval: normally standard measurements like time