Unit 9 Vocab

The sum of the items in a set of data divided by the number of items in the set, also called the average.

• Population

• Range

• Mean

• Mode

The middle number or the average of the middle numbers (mean), in an ordered set of data.

• Random Sample

• Median

• Range

• Mode

The number or numbers that occur most frequently in a set of data.

• Median

• Range

• Prediction

• Mode

The difference between the greatest and least values in a data set.

• Mean

• Lower Quartile

• Mode

• Range

Something you can reasonably expect to happen in the future.

• Upper Quartile

• Prediction

• Population

• Random Sample

A sample in which each individual or object in the entire population has an equal chance of being selected.

• Random Sample

• Upper Quartile

• Mean

• Population

The entire group of objects or individuals considered for a survey.

• Range

• Mode

• Random Sample

• Population

The difference between the upper and lower quartiles in a box and whiskers plot.

• Upper Quartile

• Interquartile Range (IQR)

• Lower Quartile

• Prediction

The median of the lower half of a set of data

• Upper Quartile (Q3)

• Range

• Interquartile Range (IQR)

• Lower Quartile (Q1)

The median of the upper half of a set of data.

• Mode

• Upper Quartile (Q3)

• Range

• Lower Quartile (Q1)