Mean, Median, Mode, and Range

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• Math Extension and Intervention
• Be on time and be respectful to others.A large
  group
• No food or drinks or popping gum
• No email, searching, or playing regular
  games..Interactive math websites only
• Try to improve
• Bring pencil and paper and your calculator or you
  can use the one on the computer.

2

• Pre-test on Monday..Post-test on Friday
• Score on Pre-test will determine what we help you
  with
• Either Mean, Median, Mode and Range or
  Probability
• Make sure you record your scores on both tests on
  your paper
• Hope you get some Math MOOVES ticketsGood luck

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Mode
Mean
Range
Median
WHAT DO THEY ALL MEAN?
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Mean

• Is the average of a set of numbers.

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How is the mean of a set of numbers found?

• Add all the numbers in the set together.
• Divide the sum by the number of numbers in the
  set.
• The quotient is the mean of the set of numbers.
• Example 20, 15, 25
• Add 20152560
• Divide 60 by 3
• The mean is 20

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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.)

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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.

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• 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

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Mode

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

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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.

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• 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.

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Range

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

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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.

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• Example
• 10, 15, 20, 25, 30, 35, 40, 45, 50
• 50 10 40
• 40 is the range of this set of numbers.

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Its 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 mean?
• The answer is 10.
• 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.