Measures of Central Tendency and Variability Vocabulary

Match the following terms with their correct descriptions.

• The difference between the upper and lower quartiles

• Range

• A measure of the amount of variation or dispersion of a set of values

• Standard deviation

• The distance between the highest and lowest points in a data set

• Outlier

• An observation point that is distant from other observations

• Interquartile range

Match the following stats definitions

• add up values and divide by the number of values in set (average)

• Range

• number that occurs most often

• Mode

• middle value when ordered from least to greatest

• Median

• Highest minus lowest

• Mean

The difference between the highest data value and the lowest data value in a data set. It is a measure of variation.

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5

• 6

• 9

• 11

What is the mode?

• The value that occurs the most often in a data set

• The middle number in an ordered set of data

• The sum of all the numbers in a data set divided by the size

• The sum of the between the greatest and the least elements, divided by two

A data set can have more than one _______

• Median

• Mode

• Mean

• Midrange

What is the mode?

• 4

• 9

• 6

• 5

Which is the MIDDLE of an ordered set of data?

• Mean

• Median

• Mode

• Range

Which is a synonym for "average?"

• mean

• median

• mode

• range

If you score 76, 85, 97, and 83 on your math tests, what would your median score be? 

• 84

• 90

• 85

• 88