WHAT DO THEY ALL MEAN?

Median

• Is the number that is in the middle of a set of numbers.

• (If two numbers make up the middle of a set of numbers then the median is the average of those two numbers.)

How is the median of a set of numbers found?

• Arrange the numbers in the set in order from least to greatest.

• The middle number is the median of a set of numbers.

• If more than one number is in the middle of the set of numbers, the average of those two numbers is the median of the set of numbers.

• Examples:• 10, 15, 20• 15 is the median of this set of numbers.

• 10, 15, 20, 25• Add 15 + 20 = 35• Divide 35 by 2 = 17.5• The median of this set of numbers is 17.5

Mode

• Is the number in a set of numbers that occurs the most often.

How do I identify the mode of a set of numbers?

• Arrange the set of numbers in order from least to greatest.

• The number that occurs the most often is the mode of that set of numbers.

• Example:• 10, 15, 10, 15, 20, 25, 15, 30• 10, 10, 15, 15, 15, 20, 25, 30

• 15 is the mode of this set of numbers because it is the numbers that occurs the most.

Range

• Is the difference between the highest and lowest numbers in a set of numbers.

How is the range of a set of numbers identified?

• Arrange the numbers in the set in order from least to greatest.

• Subtract the lowest number from the highest number in the set of numbers.

• The difference of the two numbers is the range of a set of numbers.

• Example:

• 10, 15, 20, 25, 30, 35, 40, 45, 50

• 50 – 10 = 40

• 40 is the range of this set of numbers.

It’s Time To Practice!

• 10 5 25 50 15 10 40 35 10 20• 5 10 10 10 15 20 25 35 40 50.• What is the median?• The answer is 17.5• What is the mode?• The answer is 10.• What is the range?• The answer is 45.