Displaying Quantitative Data

Mode

A home or high point in the shape of the distribution of a variable

Multimodal

Distributions with more than two modes

Symmetric

Shape where the two halves on either side of the center look approximately like a mirror images of each other

Outlier

An extreme value that doesn't appear to be along with the rest of the data

Skewed

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

Bimodal

Distributions with two modes

Skewed right

Shape wear the longer tail stretches to the right

Relative frequency histogram

Uses adjacent bars to show the distribution of values in a quantitative variable, where each bar represents the proportion of values falling in an interval

Stem and leaf

Type of display that shows quantitative data values in a way that shows the shape of the distribution in addition to individual data values

Skewed left

Shape where the longer tail stretches to the left

Unimodal

Having one mode

Dot Plot

Graphs a dot for each case against a single axis

Shape

Reveals single vs. multiple modes in symmetry vs. skewness

Histogram

Uses adjacent bars to show the distribution of values in a quantitative variable, where each bar represents the number of values falling in an interval

Center

A value that summarizes the entire distribution with a single number, a "typical "value

Time plot (NOT ON TEST I ASKED HER IN TUTORING)

Used to display data that change over time

Spread

A numerical summary of how tightly the values are clustered around me "center"

Tail

The parts of a distribution that typically trail off on either side

Uniform

A distribution roughly flat in shape