Mean, Median, Mode, and Range - PowerPoint PPT Presentation

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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 ... – PowerPoint PPT presentation

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Title: Mean, Median, Mode, and Range

1
• 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
with
• Either Mean, Median, Mode and Range or
Probability
• Make sure you record your scores on both tests on
• Hope you get some Math MOOVES ticketsGood luck

3
Mode
Mean
Range
Median
WHAT DO THEY ALL MEAN?
4
Mean
• Is the average of a set of numbers.

5
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
• Divide 60 by 3
• The mean is 20

6
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.)

7
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.

8
• Examples
• 10, 15, 20
• 15 is the median of this set of numbers.
• 10, 15, 20, 25
• Divide 35 by 2 17.5
• The median of this set of numbers is 17.5

9
Mode
• Is the number in a set of numbers that occurs the
most often.

10
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.

11
• 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.

12
Range
• Is the difference between the highest and lowest
numbers in a set of numbers.

13
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.

14
• Example
• 10, 15, 20, 25, 30, 35, 40, 45, 50
• 50 10 40
• 40 is the range of this set of numbers.

15
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?