DOT PLOTS
DATA SETS
HISTOGRAMS
BOX-AND-WHISKER
MISC.
100
What is the shape of distribution for dot plot C?
Skewed Right
100
Find the mode. 4, 5, 6, 4, 4, 5, 3, 5
4 and 5
100
Use histogram D.  Which interval contains the most houses?

60-79

100
Find the MEDIAN of box-and-whisker plot G.
10
100
Find the range. 5, 7, 10, 2, 1, 7, 5
9
200
What is the shape of distribution for dot plot E?
Symmetric
200
Find the mean. 20, 4, 17, 8, 12, 9, 5, 20, 13
108/9=12
200

Use histogram F.  How many students scored less than more than 59 points on the test?

80 (49+31)

Also accept 81.

200
What is the shape of distribution for box-and-whisker plot G?
Skewed left
200

Find the median of 9, 1, 1, 9, 8, 3

5.5

3+8=11
11/2=5.5

300
What is the RANGE and MODE for the data in dot plot B?
Range-12 Mode-16 and 20
300
Find the median. 3, 5, 7, 9, 11, 3, 8
7
300

Use histogram F.  Which interval has a frequency of 38?

40-59

300
What is the IQR of box-and-whisker plot H?
230-120=110
300
Find the 1st and 3rd quartiles. 40, 33, 37, 54, 41, 34, 27, 39, 35
1st Q = 33.5 3rd Q = 40.5
400

Find the MEDIAN of the data in dot plot B.

18

400
Find the median. 5, 10, 16, 85, 90, 94
50.5 (16+85)/2
400

Use histogram D. Which interval is peak?

60-79

400

What percent of parking lots have at most 120 cars? (Use box-and-whisker plot H)

25%

400

Find the Mean Absolute Deviation of 1, 2, 2, 2, 4, 4, 4, 5

1.25

Mean=3
Differences of 10/8 = 1.25

500

Use Dot Plot E.  Based on the shape of distribution, which measure of center and variation would best describe the data?  

Center Choices: Mean or Median
Variation Choices: IQR or MAD

Mean and MAD since the data is symmetric

500

Find the mean absolute deviation of 2, 5, 8, 10, 3, 2, 1, 1

2.75

Mean=32/8=4; Differences of 22/8=2.75

500

Use histogram D. Describe the shape of the distribution.

Skewed left

500
What fraction of tents have 13 or less cocoons? (Use box-and-whisker plot G)
3/4
500

You have a skewed set of data. Which measures of center and variation would be most reliable? *mean *median *IQR *MAD

Median & IQR

M
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