The difference in a variable measured over observations is called __________.
a.
a frequency distribution
b.
a population
c.
perception
d.
variation
What does the red arrow indicate in the following box plot displaying the distribution of exam scores?
a.
Outlier
b.
25thpercentile
c.
Median
d.
3rdquartile
In a statistics class, the following 10 scores were randomly selected: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66.
What is the mode?
a.
72
b.
71.5
c.
77
d.
73
The average monthly price of regular gasoline in the United States was recorded for the years
1998–2005. Each year’s distribution of average monthly regular gasoline prices is shown in the
following box plots.
What is the shape of the distribution of gasoline prices in 2001?
a.
Left skewed
b.
Right skewed
c.
Uniform
d.
Symmetric
A researcher wants to calculate the width of each interval by using the approximation formula. He first
created a frequency distribution with 5 bins. The minimum and maximum for the variable are −32.40 and
65.42, respectfully. Calculate the width of each interval for the researcher.
a.
13.084
b.
6.604
c.
d.
19.564
What would be the approximate shape of the following histogram?
a.
Uniform
b.
Skewed left
c.
Skewed right
d.
Symmetrical
What type of relationship is represented in the following scatter chart of two numeric variables?
a.
No relationship
b.
Nonlinear relationship
c.
Positive linear relationship
d.
Negative linear relationship
What does the red arrow indicate in the following box plot displaying the distribution of exam scores?
a.
Outlier
b.
25thpercentile
c.
3rdquartile
d.
Median
A total of822 recently purchased books were randomly selected from all recent book purchases over the
Internet. The following chart shows the breakdown of book types. What percentage of books in the
sample were either mystery or science fiction/fantasy?
200
1
168
180
160
140
120
100
80
a.
36.5%
b.
18.6%
c.
24.3%
d.
17.8%
A graphical summary of the distribution of data developed from the quartiles of a set of values is a(n)
____________.
a.
box and whisker chart
b.
scatter chart
c.
frequency polygon
d.
interquartile range
A frequency distribution can be created for __________.
a.
neither categorical nor quantitative variables
b.
only quantitative variables
c.
both a categorical variable and a quantitative variable
d.
only categorical variables
A company collected the ages from a random sample of its middle managers. What would be the
approximate shape of the relative frequency histogram for the following frequency distribution?
Bin
IntervalFrequency
20 to 258
25 to 306
30 to 355
35 to 4012
40 to 4515
45 to 507
a.
Skewed right
b.
Symmetrical
c.
Skewed left
d.
Uniform
The following strip chart displays individual tips a server receives categorized by meal time at a
particular restaurant. What meal time had higher variability?
a.
Lunch
b.
Dinner and lunch had an equal amount of variability.
c.
Cannot be determined
d.
Dinner
The average monthly price of regular gasoline in the UnitedStateswas recorded for the years
1998–2005.Each year’s distribution of average monthly regular gasoline prices is shown in
thefollowingboxplot.
Which year had the highest median monthly gasoline price?
a.
1999
b.
2005
c.
2004
d.
2002
What does the red arrow indicate in the following box plot displaying the distribution of exam scores?
a.
Outlier
b.
3rdquartile
c.
25thpercentile
d.
Interquartile range
The following chart displays individual tips a server receives categorized by which meal is
served at a particular restaurant. What type of chart is used to display these data?
a.
Box plot
b.
Prediction chart
c.
Strip chart
d.
Scatter chart
We collect data from a subset of the population known as a __________.
a.
random variable
b.
sample
c.
bin
d.
frequency distribution
Based on the following strip chart, which month has the lowest temperature?
a.
June
b.
May
c.
July
d.
September
Quality control is an important issue at a manufacturing company, which manufactures Product Z. To test
the lifetime of Product Z, the company randomly sampled nine products and measured how many days
they lasted (mean = 346.6).
378, 361, 350, 375, 200, 391, 375, 368, 321
What is the sample variance?
a.
10.609
b.
58.5
c.
342
d.
3424.3
The following charts comparing multiple distributions of a data set are an example of a __________.
a.
frequency polygon
b.
scatter chart
c.
trellis display
d.
bar chart
