14 terms

Mean

The average; (How to find it?? Add up all numbers,

then divide by how many there are)

then divide by how many there are)

Median

The middle number in a data set (How to find it??

Order data from least to greatest, then find middle

number)

Order data from least to greatest, then find middle

number)

Mode

The value or values that occur most often in a data set.

Range

The difference of the least number and the greatest

number in data set. (How to find it?? Subtract smallest

number from biggest number)

number in data set. (How to find it?? Subtract smallest

number from biggest number)

Outlier

A value that is much greater than or much less than

the other values in a data set. IT WILL STAND OUT!

the other values in a data set. IT WILL STAND OUT!

Measures of

Center

Center

A single number that describes the middle of the data

set. Measures of center are Mean and Median!

set. Measures of center are Mean and Median!

Dot Plot

A data graph in which each data item is shown as a

dot above a number line.

dot above a number line.

Histogram

A bar graph that shows the frequency of data within

equal intervals.

equal intervals.

Frequency

A measure of how many times an event occurs.

Box & Whisker

Plot

Plot

A graph that shows the least and greatest values, first

and third quartiles and median of a data set. It

measures variation of data.

and third quartiles and median of a data set. It

measures variation of data.

Inter-Quartile

Range

Range

The difference of the first and third quartiles in a data

set. (How to find it?? Subtract the 3rd and 1st quartiles)

set. (How to find it?? Subtract the 3rd and 1st quartiles)

First Quartile

The median of the lower half of a data set.

Third Quartile

The median of the upper half of a data set.

Measures of

Variability

Variability

A single number that describes how spread out or how

clustered a set of data is

clustered a set of data is