7th Grade Statistic Vocabulary

The whole group that is being studied.

• Sample
• mean

• median

• Population

A selection taken from a larger group (the "population") that will, hopefully, let you find out things about the larger group.

• Sample Size
• Interquartile range

• range

• Population

The process of drawing conclusions about a larger group of individuals (the population) based on data collected from a smaller representative sample of that population.

• Population

• random sample

• range

• Population inference

A selection that is chosen randomly (purely by chance, with no predictability). Every member of the population being studied should have an equal chance of being selected.

• mean

• median

• Random sampling
• range

The average of the numbers: a calculated "central" value of a set of numbers.

• mean

• median

• mode

• range

The number that appears most often in a set of numbers.

• mean

• median

• mode

• range

The "middle" of a sorted list of numbers.

• mean

• median

• mode

• range

The difference between the lowest and highest values.

• mean

• median

• mode

• range

A value that "lies outside" (is much smaller or larger than) most of the other values in a set of data.

• IQR

• quartile

• box-and-whisker

• outlier

A measure of how spread out numbers are.

• variance

• IQR

• quartile

• dot plot