2. Main Idea and New Vocabulary Key Concept: Measures of Central Tendency
Example 1: Find Measures of Central Tendency
Example 2: Real-World Example
Lesson Menu

3. Find the mean, median, and mode of a set of data.
measures of central tendency
mean
median
mode
Main Idea/Vocabulary

4. Key Concept

5. Find Measures of Central Tendency
The ages, in years, of the actors in a play are 5, 16, 32, 15, 26, and 32. Find the mean, median, and mode of the data set.
Mean
Median 5, 15, 16, 26, 32, 32 Arrange in order from least to greatest.
Example 1

6. Find Measures of Central Tendency
Mode The mode of the data set is 32.
Answer: The mean and median are both 21 years old. The mode is 32 years old.
Example 1

7. A. mean: 8; median: 8.5; mode: 8 B. mean: 8; median: 8; modes: 7 and 8
The heights, in centimeters, of a group of bean plants are 8, 12, 7, 10, 8, 14, 6, and 7. Find the mean, median, and mode of the data set.
A. mean: 8; median: 8.5; mode: 8
B. mean: 8; median: 8; modes: 7 and 8
C. mean: 9; median: 8; mode: 7
D. mean: 9; median: 8; modes: 7 and 8
Example 1 CYP

8. SOUND Select the appropriate measure of central tendency to describe the data in the table. Justify your reasoning.
Example 2

9. Find the mean, median, and mode of the data.
The mean is about 67.1.
Median The numbers are arranged from least to greatest.
0, 10, 60, 70, 80, 110, 140
The median is 70.
Mode Since each number only occurs once, there is no mode.
Example 2

10. Sample Answer:. Since the mean and median are
Sample Answer: Since the mean and median are close in value, they are both appropriate measures of central tendency.
Example 2

11. FISH Select the appropriate measure of central tendency to describe the data in the table. Justify your reasoning.
A. The mean 10.8 is most appropriate since it is the average of all the data. The mode is too low and the median is too high.
B. The median 13 is most appropriate since half the data are above and half the data are below the median. The mode is too low and most of the data is above the value of the mean.
C. The mode is most appropriate since more tanks have 3 fish than any other number of fish.
Example 2 CYP