Warm up
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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

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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


Mean absolute deviation and quartiles

Mean Absolute Deviation and Quartiles

6.7 and 6.8


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


Warm up

  • 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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