Database Reference
In-Depth Information
9.
Which graphical display is most appropriate for modeling the relationship
described in question 8?
a.
A box and whisker plot
b.
A stem and leaf plot
c.
A pie chart
d.
A scatterplot
e.
A stacked bar graph
Answer: d. Scatterplots are used to model the relationship between two
variables.
10.
Student achievement on the state standardized exam approximates a
normal distribution. Approximately what percentage of values lie within
1 standard deviation of the mean?
a.
50 percent
b.
68 percent
c.
75 percent
d.
82 percent
Answer: b. The normal distribution is a bell-shaped, symmetrical curve.
When this is the case, the
empirical rule
states that approximately 68
percent of the data values will be within one standard deviation.
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