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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….

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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 tickets…Good luck

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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 20+15+25=60 –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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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 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.

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