A ____________ variable is a kind of statistics variable can only take on discrete specific values.

____________ can be input to a computer program or used in manual analysis procedures such as gathering statistics from a survey.

The middle value of a class is called

The class mark is also called

_____________ is the difference between the largest and the smallest values of variable.

___________ shows the different values of variable are distributed in different classes along with their corresponding class frequencies.

The highest value is called

The upper class limit is excluded but lower class limit is included in the

_____________ is obtained by joining the points of frequency polygon by a freehand smoothed curve.

Variations in the value of variables are captured by its