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Lesson 2: Summarizing Data

Section 5: Methods for Summarizing Data

Knowing the type of variable helps you decide how to summarize the data. Table 2.7 displays the ways in which different variables might be summarized.

Table 2.7 Methods for Summarizing Different Types of Variables

ScaleRatio or ProportionMeasure of
Central Location		Measure of Spread
Nominal
yes
nono
Ordinal
yes
nono
Interval
yes, but might need to group first
yesyes
Ratio
yes, but might need to group first
yesyes

Measure of central location: a single, usually central, value that best represents an entire distribution of data.

Lesson 2 - Major Sections

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