4. Day 4 Mean Absolute Deviation.notebook March 08, 2013
1. Explore: Analyzing Dot Plots
The school nurse measured all the boys' heights during their
physical education class. She made a list of the basketball
players' heights and the soccer players' heights.
Basketball Players' Heights (in.)
69, 70, 72, 73, 73, 73, 74, 75, 75, 76
Soccer Players' Heights (in.)
65, 66, 68, 69, 69, 70, 70, 70, 71, 72
A. Make a dot plot of the heights of the basketball players.
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
B. Make a dot plot of the heights of the soccer players.
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
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5. Day 4 Mean Absolute Deviation.notebook March 08, 2013
REFLECT
1.) What can you conclude about the data based on your
plots?
The data sets have a similar ___________, but the
basketball data are ________ to the right.
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7. Day 4 Mean Absolute Deviation.notebook March 08, 2013
A. Calculate the mean height for the basketball players.
69 + 70 +72+ 73 + 73 + 73 + 74 + 75+ 75 + 76 =
B. Calculate the MAD for the basketball players.
69 - 73 = 73 - 73 =
70 - 73 = 74 - 73 =
72 - 73 = 75 - 73 =
73 - 73 = 75 - 73 =
73 - 73 = 76 - 73 =
Find the mean of the absolute values.
The MAD is ___________
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8. Day 4 Mean Absolute Deviation.notebook March 08, 2013
A. Calculate the mean height for the soccer players.
65 + 66 + 68 + 69 + 69 + 70 + 70 + 70+ 71 + 72 =
B. Calculate the MAD for the soccer players.
65 - 69 = 70 - 69 =
66 - 69 = 70 - 69 =
68 - 69 = 70 - 69 =
69 - 69 = 71 - 69 =
69 - 69 = 72 - 69 =
Find the mean of the absolute values.
The MAD is ___________
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9. Day 4 Mean Absolute Deviation.notebook March 08, 2013
E How are the mean and the MAD reflected in the dot
plots.
F Find the difference of the means.
G Write the difference of means as a multiple of the MAD.
4 = 1.6 X ___
The means of the two data sets differ by ____ times
the amount that an individual height varies.
REFLECT
2. If two data sets have the same mean but different
MADs, how would that reflect in the dot plots?
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10. Day 4 Mean Absolute Deviation.notebook March 08, 2013
3 Explore: Comparing Large Populations
Paula and Dean wanted to determine the average word
length in two books. They took a random sample of 12
words each and counted the length of each word from
each book.
Book 1 Word Count
3, 7, 5, 2, 4, 3, 1, 6, 4, 8, 2, 3
Book 2 Word Count
5, 4, 3, 6, 4, 5, 5, 2, 3, 4, 2, 5
A. Calculate the mean for Book 1.
B. Calculate the MAD for Book 1.
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11. Day 4 Mean Absolute Deviation.notebook March 08, 2013
3 Explore: Comparing Large Populations
Paula and Dean wanted to determine the average word
length in two books. They took a random sample of 12
words each and counted the length of each word from
each book.
Book 1 Word Count
3, 7, 5, 2, 4, 3, 1, 6, 4, 8, 2, 3
Book 2 Word Count
5, 4, 3, 6, 4, 5, 5, 2, 3, 4, 2, 5
C. Calculate the mean for Book 2.
D. Calculate the MAD for Book 2.
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