Descriptive statistics

Completion status: this resource is ~25% complete.

Two aspects of single variables (univariate) should be described and graphed:

1. Central tendency
2. Shape and spread of the data distribution

For normally distributed variables:

1. Descriptive statistics:
   1. Central tendency: mean, median, mode
   2. Spread: standard deviation, skewness and kurtosis, range, inter-quartile range, percentiles, minimum and maximum.
2. Graphs:
   1. histogram
   2. box plot

For non-normally distributed variables:

1. Descriptive statistics:
   1. Central tendency: frequencies, percentages, mode
   2. Spread: range, inter-quartile range, percentiles, minimum and maximum
2. Graphs: bar chart, pie chart

See also

• Descriptives and graphing (Tutorial)
• Descriptives and graphing (Lecture)
• Graphing

External links

• Statistics glossary - Presenting data