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Mean, Median, Mode, and Range

Mean, Median, Mode, and Range. Mean- is the average of a set of data. To calculate the mean, find the sum of the data and then divide by the number of data. Easy One-Find the mean of the following numbers. 1, 1, 2, 4 Add them all together 1+1+2+4=8

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Mean, Median, Mode, and Range

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  1. Mean, Median, Mode, and Range

  2. Mean- is the average of a set of data. To calculate the mean, find the sum of the data and then divide by the number of data.

  3. Easy One-Find the mean of the following numbers • 1, 1, 2, 4 • Add them all together • 1+1+2+4=8 • Then divide by the amount of numbers used (4) 8/4= • The mean is 2

  4. 12, 15, 13, 11, 14 First, find the sum of the data. (That means add all the numbers up) 12 + 15 +13 + 11 + 14 = 65 Then divide by the number of data. 65 / 5 =?? The mean =13

  5. You can remember that “mean” means to average because the “mean teacher averages your grade.” You try the next one!

  6. An electronics store sells DVDs at the following prices: $35, $25, $50, $35, $10, $35, $20 and $30. What is the mean price? Find your answer before clicking!

  7. $35 + $25 + $50 + $35 + $10 +$35 + $30 + 20 = $240 $240 / 8 = $30.00 The mean or average price of a DVD is $30.00

  8. How much does Big Ben help the Steelers? The Steelers have played 12 games this year. Eight with Ben as the quarterback, and four without Ben. I want to know if the Steelers averaged (mean) more points per game with Ben than without? How could I find that information??? I would need to find the mean score for games he played in, and find the mean score in games he didn’t play. Then I could compare the two numbers. Round to the ones place. Steelers Mean Score without Ben= 22 22 23 Steelers Mean Score with Ben= 23

  9. Let’s Find how mean shoe size • Tell me your shoe size • Add them all up • Divide by 11 That is our mean shoe size for this class

  10. Median is the middle number in a set of data. When the data is arranged from least to greatest

  11. 12, 15, 11, 11, 7, 13, 17 First, arrange the data in order from least to greatest. Then cross out at each end till you only have one number left in the middle 7, 11, 11, 12, 13, 15, 17 The median is 12

  12. 12, 15, 5, 11, 11, 7, 13, 17 First, arrange the data in order from least to greatest. 5, 7, 11, 11, 12, 13, 15, 17 Then find the number in the middle, if there is no number in the middle, then find the average (mean) of the two numbers in the middle. 5, 7, 11, 11, 12, 13, 15, 17 11+12=23 23/2= 11.5 The median is 11.5

  13. An electronics store sells CD players at the following prices: $350, $275, $500, $325, $100, $375, and $300. What is the median price? Find your answer before clicking!

  14. First place the prices in numerical order. $100, $275, $300, $325, $350, $375, $500 The price in the middle is the median price. The median price is $325.

  15. The mode is the number that occurs the most.

  16. 12, 15, 11, 11, 7, 13 The mode is 11.

  17. Sometimes a set of data will have more than one mode. For example, in the following set the numbers both the numbers 5 and 7 appear twice. 2, 9, 5, 7, 8, 6, 4, 7, 5 5 and 7 are both the mode and this set is said to be bimodal.

  18. Sometimes there is no mode in a set of data. 3, 8, 7, 6, 12, 11, 2, 1 All the numbers in this set occur only once therefore there is no mode in this set.

  19. $100, $275, $300, $325, $350, $375, $500 What is the mode ? Find your answer before clicking!

  20. $100, $275, $300, $325, $350, $375, $500 There is no mode!

  21. You can remember that mode means the number that occurs the most because “mode” and “most” sound alike!

  22. The range of a set of data is the difference between the largest and the smallest number in the set. For example, consider the following set: 40, 30, 43, 48, 26, 50, 55, 40, 34, 42, 47, and 50 To find the range you would take the largest number, 50, and subtract the smallest number, 26. 55 – 26 = 29 The range is 29!

  23. Mean The average Median The number or average of the numbers in the middle Mode The number that occurs most

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