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31. A ______________ shows the
relationship between two variables

A. Box plot

B. Bar chart

C. Histogram

D. Scatter Plot

E. Pie chart

32. In a given data set the 25th percentile is
_______________ equal the lower hinge.

A. Always

B. Sometimes

C. Never

33. An airline company is, on
average, late 10 minutes for arrivals. If the variance for the lateness
statistic is

9, then the coefficient of
variation is _____.

A. 3

B. 300

C. 10

D. 90

E. 30

34. _____________ are used to
describe qualitative (categorical) data.

A. Stem and leaf displays and
scatter plots.

B. Scatter plots and box plots

C. Box plots and bar charts

D. Bar charts and pie charts

E. Pie charts and histograms

35. Which of the following is
influenced the least by the occurrence of extreme values in a sample?

A. Mean

B. Median

C. Mode

D. Geometric mean

E. Weighted mean

36. If a population distribution
is positively skewed (to the right), then, given a random sample from that

population, one would expect that
the _____

A. median would be greater than
the mean.

B. mode would be equal to the
mean.

C. median would never equal the
mode.

D. median would be equal to the
mean.

E. median would be less than the
mean.

37. If a statistics course is
determined by three exams. Exam 1 is worth 25% of the course grade. Exam 2 is

worth 35% of the course grade.
Exam 3 is worth 40% of the course grade. Calculate the term grade for a

student with a 52% for the first
exam, 63% for the second exam, and 75% for the third exam.

A. 45.75%

B. 65.05%

C. 55.25%

D. 36.35%

E. 63.00%

38. If the mean, median, and mode
for a given population all equal 25, then we know that its distribution is

_____.

A. Bimodal

B. Skewed to the right

C. Symmetric

D. Skewed to the left

39. If one intends to compare the
relative variation between two samples involving two different quantitative

variables with different
measurement scales, then the most appropriate way is to compare the two

samples:

A. Standard deviations

B. Variances

C. Coefficient of variations

D. Ranges

E. Interquartile ranges

40. A disadvantage of using
grouping (a frequency table) with sample data is that:

A.

Calculations involving central
tendency and variation are more complicated than central tendency and

variation calculations based on
ungrouped data.

B. The descriptive statistics are
less precise than the descriptive statistics obtained using ungrouped data.

C. The interpretation of the
grouped data descriptive statistics is meaningless.

D. It is much more difficult to
summarize the information than it is with the ungrouped data.

E. It is more difficult to interpret a pie chart.

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27 Feb 2018

Due Date: 27 Feb 2018
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