Warm - up

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# Warm - up - PowerPoint PPT Presentation

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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Presentation Transcript
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
• 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
Mean absolute deviation
• Is the average deviation of the data from the mean.
Find the mean absolute deviation
• A) 9, 15, 28, 10, 8
• B) 32, 33, 22, 85, 58
More mean absolute deviation

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

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

Now You Try
• Find the mean absolute deviation
• A) 105, 98, 95, 100, 95, 107
• B) 36, 39, 58, 42, 106, 39, 48, 45
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
• 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.
• A) 4, 7, 14, 8, 9
• B) 85, 90, 76, 65, 92, 88
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
• Page 365 numbers 9-14 all
• Page 372 numbers 1 – 5 all