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Warm - up. Find the mean of the following number sets. 1. 2, 32, 6, 15, 12, 14 2. 6, 45, 78, 21, 17, 16 3. 7, 3, 1, 8, 4. Mean Absolute Deviation and Quartiles. 6.7 and 6.8. Vocabulary. Measure of dispersion A description of the dispersion or the spread of the data Range

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warm up
Warm - up
  • Find the mean of the following number sets.
  • 1. 2, 32, 6, 15, 12, 14
  • 2. 6, 45, 78, 21, 17, 16
  • 3. 7, 3, 1, 8, 4
vocabulary
Vocabulary
  • Measure of dispersion
    • A description of the dispersion or the spread of the data
  • Range
    • The difference between the greatest value and least value
  • Deviation from the mean
    • Is the difference of a data value and the mean of the data set
slide4
Mean absolute deviation
    • Is the average deviation of the data from the mean.
find the mean absolute deviation
Find the mean absolute deviation
  • A) 9, 15, 28, 10, 8
  • B) 32, 33, 22, 85, 58
more mean absolute deviation
More mean absolute deviation

C. 24, 35, 18, 20, 17, 30

D) 116, 130, 120, 125, 140, 125

now you try
Now You Try
  • Find the mean absolute deviation
  • A) 105, 98, 95, 100, 95, 107
  • B) 36, 39, 58, 42, 106, 39, 48, 45
vocabulary1
Vocabulary
  • Quartile
    • the median of an ordered data set
  • Upper Quartile
    • the median of the upper half of an ordered set
  • Lower Quartile
    • the median of the lower half of an ordered set
  • Interquartile range
    • The difference of the upper quartile and lower quartile
examples
Examples
  • Find the mean, median, range, and the interquartile range.
  • Data set 1: 102, 105, 108, 110, 112, 113
  • Data set 2: 100, 103, 105, 106, 109, 113
find the mean median range and the interquartile range
Find the mean, median, range, and the interquartile range.
  • A) 4, 7, 14, 8, 9
  • B) 85, 90, 76, 65, 92, 88
now you try1
Now You Try
  • Find the mean, median, range, and the interquartile range.
  • A) 110, 145, 115, 124, 118, 129, 119
  • B) 50, 55, 60, 58, 62, 57, 68, 51, 63
homework
Homework
  • Page 365 numbers 9-14 all
  • Page 372 numbers 1 – 5 all
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