MEAN, MEDIAN, MODE, AND RANGE

Section 1.6

Measures of Central Tendency

The mean of a data set is the sum of the values divided by the number of values.

Minimum monthly temperatures (C) for Big Delta, Alaska.-24, -21, -17, -7, 3, 8, 11, 8, 2, -8, -18,

-23

What is the mean of the data set?-7.17

Measures of Central Tendency

The median of a data set is the middle value when the values are written in numerical order. If a data set has an even number of values, the median is the mean of the two middle values.

Minimum monthly temperatures (C) for Big Delta, Alaska.

-24, -21, -17, -7, 3, 8, 11, 8, 2, -8, -18, -23

What is the median of the data set?-24, -23, -21, -18, -17, -8, -7, 2, 3, 8, 8, 11

-7.5

Measures of Central Tendency

The mode of a data set is the value that occurs most often. A data set can have no mode, one mode, or more than one mode.

Minimum monthly temperatures (C) for Big Delta, Alaska.-24, -21, -17, -7, 3, 8, 11, 8, 2, -8, -18, -

23

What is the mode of the data?8

A Measure of Dispersion

The range of a data set is the difference of the greatest value and the least value.

Minimum monthly temperatures (C) for Big Delta, Alaska.

-24, -21, -17, -7, 3, 8, 11, 8, 2, -8, -18, -23

What is the range of the data set?11 – (-24) = 350 C

Mean, Median, Mode, and Range

Here are some scores from a card game:154, 113, 172, 161, 145

Find the mean, median, mode, and range of the data set.

Mean = 149 Median = 154Mode = no mode Range = 59

If the scores were doubled, what would happen to the mean, median, mode, and range?They would all double.

Homework

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