Displaying and Summarizing Quantitative Data

A series of vocabulary flashcards derived from the lecture notes on displaying and summarizing quantitative data, covering key terms and their definitions.

Dot Plot

A plot that portrays individual observations with dots placed above or next to their values on a number line.

Histogram

A graph that uses bars to show how often measurements fall in particular equal-width intervals.

Skewness

The measure of the asymmetry of the distribution of values; can be positive (right-skewed) or negative (left-skewed).

Outlier

An individual value that falls outside the overall pattern of the data distribution.

Stem-and-Leaf Display

A method that divides each observed number into two parts: the 'stem' and the 'leaf', used to portray individual observations.

Mode

The most frequently occurring value in a dataset.

Unimodal Distribution

A distribution with a single peak or mode.

Bimodal Distribution

A distribution with two peaks or modes.

Frequency

The number of times a particular value occurs in a dataset.

Spread

The range of values and their concentration around the center of the data.

Center

The value that splits the dataset in half; includes measures like mean, median, and mode.

Relative Frequency

The frequency of a class interval divided by the total number of observations; expressed as a percentage.

Back-to-back Stemplot

A stemplot used for comparing two groups by displaying their stems and leaves on opposite sides.

Bar Chart

A visual representation of categorical data using bars to represent the frequency of each category.

Scatterplot

A graph that uses dots to represent values for two different numeric variables.

Time Plot

A graph that displays data points against time to show how a variable changes over time.