Descriptive Statistics

Descriptive Statistics

1. Categorical data

   • each data point is assigned a category
   • Nominal data

2. Discrete data

   • Ordinal data
   • logical order but no scaling

3. Continuous data

   • scale data
   • data has ranking and scale

4. Measures of central tendency

   • The mean (average)
   • The median (middle)
   • The mode (most frequent)

5. Measures of dispurtion

   • Range
   • Variance
   • Standard deviation