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Interpreting Graphs: Box Plots, Stem & Leaf
Contributed by: Walker

A study was conducted to determine the effectiveness 

of a speed limit sign.The speeds of cars at the 65 mph 

 sign were: 60  70  65  70  74  58  71  88  65  85

Which box-and-whisker plot correctly displays the info?

A

B
C
D

Mr. Andrews made a box-and-whisker graph 

of the quiz grades in his chemistry class.  

Which is the median quiz grade for the class?

70
86
77
58

Which data set matches the following 

 statistics? The mean is 5, the median is 4, and the

 mode is 4.


3, 4, 4, 6, 9

4, 2, 4, 4, 8
2, 3, 8, 7, 4
4, 3, 6, 4, 8
Which number occurs the most often?
5
77

0

7
What does 9|4 mean?
49
9/4
94
904
Find the lower quartile for the quiz scores
Find the Interquartile Range of the quiz scores

3
5
13
7
17
17
none of these
12
Choose which stem-and-leaf plot shows the data:
62, 73, 93, 81, 75, 85, 73
A
C
B
D
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