# Quiz 11: Making Sense of Data: First Steps

Political Science

Q 1Q 1

An empirical ___________ distribution is a table that shows the number of observations having each value of a variable.
A) Frequency
B) Proportion
C) Cumulative proportion
D) Variance

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Multiple Choice

A

Q 2Q 2

By transforming the raw frequency into a proportion or percentage we get a __________ frequency.
A) Cumulative
B) Relative
C) Proportional
D) Distributive

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Multiple Choice

B

Q 3Q 3

A ____________ statistic is a number that, because of its definition and formula, describes certain characteristics or properties of a batch of numbers.
A) Relative
B) Cumulative
C) Descriptive
D) Proportional

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Multiple Choice

C

Q 4Q 4

A good reason to use the trimmed mean instead of the mean is to correct for
A) Outliers
B) Variation
C) Discrepancies
D) Bias

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Multiple Choice

Q 5Q 5

A frequency distribution that displays a few observations on the left or low end of the scale, and most observations are in the middle or high end of the scale is called
A) Positively skewed
B) Negatively skewed
C) Positive kurtosis
D) Negative kurtosis

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Multiple Choice

Q 6Q 6

The ____________ is the category with the greatest frequency of observations.
A) Median
B) Mode
C) Mean
D) Weighted mean

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Multiple Choice

Q 7Q 7

A measure of _____________ describes the typical case in distribution.
A) Variation
B) Protocol
C) Deviation
D) Central tendency

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Multiple Choice

Q 8Q 8

The __________ is a value that divides a distribution in half.
A) Median
B) Mode
C) Mean
D) Weighted mean

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Multiple Choice

Q 9Q 9

By subtracting the minimum value from the maximum value in a batch of numbers you can calculate the _______.
A) Range
B) Interquartile range
C) Variance
D) Standard deviation

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Multiple Choice

Q 10Q 10

The _________ is a value that divides a distribution in half.
A) Mean
B) Mode
C) Median
D) Weighted mean

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Multiple Choice

Q 11Q 11

Some measures of central tendency, known as _______________, are not sensitive to one or a few extremes values.
A) Outliers
B) Recalcitrant measures
C) Central tendency
D) Resistant measures

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Multiple Choice

Q 12Q 12

If there is no variability (all the scores of the variable have the same value), measures of dispersion will equal
A) 0
B) 1
C) 1
D) Cannot be calculated

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Multiple Choice

Q 13Q 13

All of the following statements are true of measures of dispersion, except
A) If there is no variability, the measure will equal 0
B) If there is variability, the measure will be greater than 1
C) The measure will always be a positive number
D) The greater the variability in the data, the larger the numerical value of the measure

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Multiple Choice

Q 14Q 14

The _________ is the square root of the _________.
A) Range, interquartile range
B) Interquartile range, range
C) Standard deviation, variance
D) Variance, standard deviation

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Multiple Choice

Q 15Q 15

One can calculate the range by subtracting the ___________ from the ____________.
A) Minimum, maximum
B) Maximum, minimum
C) Median, mean
D) Mean, median

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Multiple Choice

Q 16Q 16

A _______ displays all of the observed values in a batch of numbers as dots along a horizontal or vertical line that represents the variable.
A) Bar chart
B) Histogram
C) Dot chart
D) Box plot

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Multiple Choice

Q 17Q 17

The ___________ is the average or mean of squared deviations, or the average of all the squared differences between each score and the mean.

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Short Answer

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Short Answer

Q 19Q 19

A __________ is a type of bar graph in which the height and area of the bars are proportional to the frequencies in each category of a nominal variable or in intervals of a continuous variable.

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Short Answer

Q 20Q 20

Why would one want to use a trimmed mean instead of a mean? In your answer please provide a numerical example that demonstrates the advantage.

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Essay

Q 21Q 21

Please identify and define three measures of central tendency. Use an example for why you might want to calculate all three measures.

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Essay

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Q 23Q 23

How do measures of central tendency and variation complement each other when describing data?

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Essay

Q 24Q 24

What is the sum of the deviations from the mean? How do you know your answer will always be correct regardless of the data used?

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Essay

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