Probability and Measure of Center and Variability

The value for which half the numbers are larger and half are smaller. If there are two middle numbers, the median is the arithmetic mean of the two middle numbers. Note: The median is a good choice to represent the center of a distribution when the distribution is skewed or outliers are present.

• Median-

• Mode

• Box Plot

• Mean

The number that occurs the most often in a list. There can be more than one mode, or no mode.

• Range

• Median

• Mode

• Mean

Describes how spread out or closely clustered a set of data is. Variability includes range and interquartile range.

• Median

• Variability

• Mean

• Mode

a summary measure that attempts to describe a whole set of data with a single value that represents the middle or centre of its distribution.

• Median

• Mean

• Mode

• Central Tendency

A statistical chart consisting of data points on a number line, typically using circles.

• Dot Plot

• Box and Whisker Plot

• Line Plot

• Histogram

A measure of spread for a set of data. To find the range, subtract the smallest value from the largest value in a set of data.

• Mean

• Maximum

• Minimum

• Range

What is the MEAN of the data set below?

• 14

• 18

• 31

• 90

Which of the following is NOT a Measure of Center?

• mean

• median

• mode

• range

What is the median of the data set?

• 18

• 20

• 22

• 51

What is the mode of the data set?

• 12

• 14

• 12 and 14

• no mode