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Mean, median, mode, & range ppt
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- 2. Agenda O Review O Mean OMedian O Mode O Range O Mean, median, mode, range foldable O Worksheet O Playing a game O Quiz
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- 4. O Mean :(average) O The "Mean" is computed by adding all of the numbers in the data together and dividing by the number elements contained in the data set.
- 5. O Example : OData Set = 2, 5, 9, 3, 5, 4, 7 O Number of Elements in Data Set = 7 O Mean = ( 2 + 5 + 9 + 7 + 5 + 4 + 3 ) / 7 = 5
- 6. O Median :(middle) O The "Median" of a data set is dependent on whether the number of elements in the data set is odd or even. O First reorder the data set from the smallest to the largest O Mark off high and low values until you reach the middle. O If there 2 middles, add them and divide by 2.
- 7. O Examples :Odd Number of Elements O Data Set = 2, 5, 9, 3, 5, 4, 7 O Reordered = 2, 3, 4, 5, 5, 7, 9 ^ O Median = 5
- 8. O Examples :Even Number of Elements O Data Set = 2, 5, 9, 3, 5, 4 O Reordered = 2, 3, 4, 5, 5, 9 ^^ Median = ( 4 + 5 ) / 2 = 4.5
- 9. O Mode :(most often) O The "Mode" for a data set is the element that occurs the most often. O It is not uncommon for a data set to have more than one mode. O This happens when two or more elements occur with equal frequency in the data set.
- 10. O Example : OData Set = 2, 5, 9, 3, 5, 4, 7 O Mode = 5 O Example: O Data Set = 2, 5, 2, 3, 5, 4, 7 O Modes = 2 and 5
- 11. O Range : OThe "Range" for a data set is the difference between the largest value and smallest value contained in the data set. O First reorder the data set from smallest to largest then subtract the first element from the last element.
- 12. Examples : O DataSet = 2, 5, 9, 3, 5, 4, 7 O Reordered = 2, 3, 4, 5, 5, 7, 9 O Range = ( 9 - 2 ) = 7
- 14. O To findthe mean: O 1. ------------------- all values. O 2. ----------------------- by the number of the values.
- 15. O Example : OData Set = 2, 5, 9, 3, 5, 4, 7 O Number of Elements in Data Set = 7 O Mean = ( 2 + 5 + 9 + 7 + 5 + 4 + 3 ) / 7 = 5
- 16. To find themedian: O 1. Put numbers in -------------------- from least to greatest. O 2. Mark off high and low values until you reach the ------------------ O 3. If there 2 middles, add them and ------------ ------ by 2
- 17. O Examples :Odd Number of Elements O Data Set = 2, 5, 9, 3, 5, 4, 7 O Reordered = 2, 3, 4, 5, 5, 7, 9 ^ O Median = 5
- 18. O Examples :Even Number of Elements O Data Set = 2, 5, 9, 3, 5, 4 O Reordered = 2, 3, 4, 5, 5, 9 ^^ Median = ( 4 + 5 ) / 2 = 4.5
- 19. O To findthe mode: O 1. Put numbers in ------------------ from least to greatest. O 2. Find the numbers that appears the ----------- -----. O 3. There may be more than one mode, or O there may be --------------- .
- 20. O Example : OData Set = 2, 5, 9, 3, 5, 4, 7 O Mode = 5 O Example: O Data Set = 2, 5, 2, 3, 5, 4, 7 O Modes = 2 and 5
- 21. To find therange: 1. Put numbers in ----------------- from least to greatest. 2. --------------------------- the lowest number from the highest number.
- 22. Examples : O DataSet = 2, 5, 9, 3, 5, 4, 7 O Reordered = 2, 3, 4, 5, 5, 7, 9 O Range = ( 9 - 2 ) = 7
- 23. Worksheet Find the mean,median, mode, range
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