AP Stat Vocabulary

An individual about whom or which we have data.

• case
• units
• data
• sample

Systematically recorded information, whether numbers or labels, together with it's context

• units
• case
• sample
• data

All the cases we wish we knew about.

• data
• units
• population
• context

Tells Who was measured, What was measured, How the data were collected, Where the data were collected, and When and Why the study was performed.

• subject
• context
• case
• respondent

A categorical variable that records a unique value for each case, used to name or identify. → Quantitative Variable

• True
• False

a circular chart divided into triangular areas proportional to the percentages of the whole

• pie chart
• bar chart
• line graph
• histogram

a two-dimensional (rows x columns) table formed by 'cross-classifying' subjects or events on two categorical variables

• frequency table
• contingency table
• bar chart

Displays the count (frequency) of observations in each category or class.

• contingency table
• frequency table
• segmented bar chart

When a distribution is not symmetric and one tail stretches farther than the other. 

• distribution
• skewed distribution
• symmetric distribution
• uniform distribution

look for: single vs. multiple modes, symmetry vs. skewness, outliers and gaps   

•  Shape
• Mean
• Range
• Gap