Descriptive Statistics

What is a population versus a sample?

A population is the entire group of interest; a sample is a subset of the population that is actually observed and used

What is the difference between a parameter and a statistic?

A parameter is a numerical summary of a population; a statistic is a numerical summary computed from a sample.

What is the difference between qualitative and quantitative data?

Qualitative (categorical) data describe categories or labels; quantitative (numerical) data are measured or counted numb

What is the difference between discrete and continuous data?

Discrete data take countable, separate values (often integers); continuous data can take any value within an interval (m

Name the four levels of measurement.

Nominal, ordinal, interval, and ratio.