Types of data

• Population - the total set of observations that can be made.
• Sample - a set of observations drawn from a population.
• Parameter - a measurable characteristic of a population, denoted by greek letters.
• Statistic - a measurable characteristic of a sample, denoted by lowercase letters.
• Primary - data that is collected by a researcher from first-hand sources.
• Secondary - data gathered from second hand sources (other people).
• Qualitative - categorical, written.
• Quantitative - numerical data.
• Discrete - data that can be counted as it only takes certain values.
• Continuous - data that takes any values.