Chapter 1.4

Quantitative data

data associated with numbers

Qualitative data

data which is not numerical

discrete data

numerical data that can only take specific values in a given range. e.g number of people

continuous data

numerical data that can take any value in a given range. e.g time

class boundary

tells you the maximum and minimum values that belong in each class

midpoint

average of the class boundaries

class width

the difference between the upper and lower boundaries