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Foldable Directions

Foldable Directions. For a set of data…. Very Top Tab. Order the numbers from least to greatest. Second Tab. MEAN Average- Your “mean” teacher averages your grades. Add up all the numbers and divide by the # of items in your data set. Third Tab. MEDIAN The middle number.

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Foldable Directions

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  1. Foldable Directions For a set of data…

  2. Very Top Tab • Order the numbers from least to greatest.

  3. Second Tab • MEAN • Average- Your “mean” teacher averages your grades. • Add up all the numbers and divide by the # of items in your data set.

  4. Third Tab • MEDIAN • The middle number. • Mark out the first and last numbers until you get to the middle. • If there are 2 numbers left in the middle, add them together and divide by 2. • The median divides the data into an upper half and a lower half.

  5. Fourth Tab • MODE • Occurs most often • If no # is listed more than once, there is NO MODE. • There can be more than one mode.

  6. Fifth Tab • RANGE • The difference between the highest and lowest #’s in the data set. • Highest # - Lowest # = Range

  7. Sixth Tab • UPPER QUARTILE • UQ • The middle # of the upper half of the data (to the right of the median) • Cross out first and last #’s until you get to the middle #. • If there are 2 #’s in the middle, add them together and divide by 2.

  8. Seventh Tab • LOWER QUARTILE • LQ • The middle # of the lower half of the data (to the left of the median) • Cross out first and last #’s until you get to the middle #. • If there are 2 #’s in the middle, add them together and divide by 2.

  9. Eighth Tab • INTERQUARTILE RANGE • IQR • The difference between the upper quartile and the lower quartile. • UQ – LQ = IQR

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