Statistics

Simple random sampling

Systematic or interval sampling

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Stratified sampling

Cluster sampling

Stratified sampling question

MEASURES OF SPREAD

Range

Quarters and quartiles

Interquartile range

Deviations

Mean deviation

STANDARD DEVIATION

Why do we divide by ā€˜nā€“1ā€™?

Using your calculator to find statistical measures

Changing into statistical mode

Changing your calculator into statistical mode

Clearing the statistical memory

Inputting the data

Finding statistical information