Numerical, graphical, and tabular methods for organizing and summarizing data
The entire collection of individuals or measurements about which information is desired
A part of the population selected for study
Non-numerical individual observations
Quantitative individual observations
Discrete Numerical Data
Possible values are isolated points on the number line
Continuous Numerical Data
Possible values form an entire interval on the number line
Each observation consists of two or more responses or values
A table that displays frequencies, and sometimes relative frequencies, for each of the possible values of a categorical variable
A graph of a frequency distribution for a categorical data set. Each category is represented by a bar, and the area of the bar is proportional to the corresponding frequency or relative frequency.
A picture of numerical data in which each observation is represented by a dot on or above a horizontal measurement scale.