Unit 1 AP Stats Vocabulary

Front

What is a variable?

Back

A characteristic that changes from one individual to another.

Front

What are the two types of variables?

Back

Categorical and Quantitative

Front

How would you describe a categorical variable?

Back

A categorical variable represents data sorted into distinct groups or categories.

Front

What is a quantitative variable?

Back

A quantitative variable is characterized by numerical values that can be measured or counted.

Front

The following are examples of what type of variable?

Dominant hand, age group (young or old), highest degree earned.

Back

Categorical Variables

Front

The following are examples of what type of variable?

Age of a structure, height of a child, concentration of a sample.

Back

Quantitative variables

Front

What is the difference between a frequency table and a relative frequency table?

Back

A frequency table you construct tables to organize how many observations fall into each category and a relative frequency table consists of fraction, decimals, or percentage each category represents.

Front

What types of data does bar graph represent?

Back

Bar graphs are used to display frequencies or relative frequencies for categorical data.

Front

Explain the difference between discrete and continuous quantitative variables.

Back

Discrete quantitative variables represent values that can be counted, such as the number of students in a class. Continuous quantitative variables can take any value within a range, such as height or weight.

Front

Discrete variable

Back

A discrete variable can take on a countable number of values, which may be finite or countably infinite. (No decimal numbers)