Unit 1 Topics 1.1-1.2, 1.5-1.9 Vocabulary

Front

What is a variable?

Back

A characteristic that changes from one individual to another.

Front

What is a categorical variable?

Back

A variable that takes on values that are category names or group labels.

Front

What is a quantitative variable?

Back

A variable that takes on numerical values for a measured or counted quantity.

Front

What is a discrete variable?

Back

A variable that can take on a countable number of values, which may be finite or countably infinite.

Front

What is a continuous variable?

Back

A variable that can take on infinitely many values, but those values cannot be counted.

Front

What does the height of each bar in a histogram represent?

Back

The number or proportion of observations that fall within the interval corresponding to that bar.

Front

What is a stem and leaf plot?

Back

A plot where each data value is split into a 'stem' (the first digit or digits) and a 'leaf' (usually the last digit).

Front

What is a dotplot?

Back

A plot that represents each observation by a dot, with the position on the horizontal axis corresponding to the data value of that observation.

Front

What is a cumulative graph?

Back

A graph that represents the number or proportion of a data set less than or equal to a given number.

Front

What are the key features of a distribution of quantitative data?

Back

Shape, center, variability (spread), and any unusual features such as outliers, gaps, clusters, or multiple peaks.