FREQUENCY-DISTRIBUTIONS-AND-GRAPHS

Raw Data

Data collected in its original form before organization.

Frequency Distribution

Organizing raw data into a table form using classes and frequencies.

Categorical Frequency Distributions

Used for data that can be placed in specific categories.

Ungrouped Frequency Distributions

Used for data that can be enumerated and have a small range of values.

Grouped Frequency Distributions

Used for data with a large range of values that need to be grouped into classes.

Class Limits

Smallest and largest data values that can be included in a class.

Lower Limits and Upper Limits

The lowest and highest values of a class.

Class Boundaries

Used to separate classes in a frequency distribution.

Class Width

The difference between the lower (or upper) class limit of one class and the lower (or upper) class limit of the previous class.

Histogram

A graph that uses vertical bars to represent frequencies.

Frequency Polygon

A graph that uses lines to connect points representing frequencies at the midpoint of classes.

Cumulative Frequency Graph or Ogive

A graph representing cumulative frequencies in a frequency distribution.

Pareto Chart

A graph used to represent a frequency distribution for a categorical variable.

Time Series Graph

A graph representing data that occur over a specific period of time.

Pie Graph

A graph divided into sections or wedges representing the percentage of frequencies in each category of a distribution.