20 terms

constant speed

Moving at a steady rate over time

data clusters

When three or more data elements occur together in a significant way.

dependent variable

The outcome factor; the variable that may change in response to manipulations of the independent variable.

double number line diagrams

A graphic diagram that shows a proportional relationship between two quantities.

equivalent ratios

Ratios that have the same value.

data gaps

A part series of observations, measurements, facts, or information that is lacking data.

independent variable

A variable whose variation does not depend on that of another.

mean

A measure of center in a set of numerical data, computed by adding the values in a list and then dividing by the number of values in the list.

median

A measure of center in a set of numerical data. The median of a list of values is the value appearing at the center of a sorted version of the list - or the mean of the two central values if the list contains an even number of values.

mode

A measure of central tendency that identifies the most frequently occurring score in a distribution.

peak

Maximum value in a data set (either positive or negative).

percent

A ratio that compares a number to 100

range

Distance between highest and lowest scores in a set of data.

rate

A ratio that compares two quantities measured in different units

ratio

The quantitative relation between two amounts showing the number of times one value contains or is contained within the other.

symmetry

The correspondence in size, shape, and relative position of parts on opposite sides of a median line or about central axis.

tape diagrams

Visual models that use rectangles to represent the parts of a ratio.

unit pricing

The cost per unit of something.

unit rate

A rate in which the second quantity in the comparison is one unit

variability

Represents how spread out a group of data is using measures such as range, standard deviation, etc.