Types Of Data

Question 1

Nominal data.

Answer 1

• least precise.
• catergorical or qualitative (e.g. Sex, favourite colour, etc).
• no sense of order.
• frequency or percentages.
• cannot calculate a mean.
• most commonly a column chart, also pie chart or bar chart.

Question 2

Ordinal data.

Answer 2

• e.g. Variables (rank, satisfaction, etc).
• have a meaningful order, but the intervals between the values in the scale may not be equal.
• can be given as frequencies.
• column or bar chart.

Question 3

Interval/ratio.

Answer 3

• most precise level of measurement.
• e.g. Number of customers, weight, age and size.
• also known as scale, quantative or parametric.
• can be discrete with whole numbers or continuous with fractional numbers.
• has a mean, median and mode.
• bar chart or histogram, box plot or line chart.
• ONLY type of data that mean can be calculated from.