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AS Statistics Revision

Statistics 1 ­ Chapter 2
Representation of sample data

Key points to remember
Data = a series of observations, measurements or facts.

Variable = that which is measured or observed, e.g. height.

Type of Variable
Quantitative variable = one with measurements as numbers.
Qualitative variable = one…

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Lower class boundary = 7.5
Lower class limit = 8
Class midpoint = 9
Upper class limit = 10
Upper class boundary = 10.5
Class width = 3

Histogram = used to represent a continuous variable which
been summarised by a group frequency distribution. Each
or class is…



hey these are great but what exam board is this?!



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