Nominal/ordinal and discrete/continuous data; Frequency/count/proportion tables; Bar/pie charts, dot/stem plots and histograms; Appropriate and misleading displays; justified treatment of outliers
Example 1
Which variable is ordinal categorical?
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Answer: Satisfaction: low, medium, high
Ordinal categories have an inherent order without a required numerical spacing.
Example 2
A frequency table has counts 4,2,2. Find the total frequency.
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Answer: 8
Add the category frequencies.
Example 3
A category has frequency 3 out of 15. Find its relative frequency.
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Answer: 51
Relative frequency = count/total =51.
Put it into practice.
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