Question 1

The interquartile range is the distance between ___________.

Accepted Answer

the first ...

Question 2

What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17, median of 12 and standard deviation of 6?

Accepted Answer

A)   +2.5
B)   -2.5
C)   +0.83
D)   -0.83

Question 3

What statistic can be used to measure the relative symmetry of a distribution? ___________________________________

Accepted Answer

Coefficien...

Question 4

What does the interquartile range describe?

Accepted Answer

A)   The lower 50% of the observations
B)   The middle 50% of the observations
C)   The upper 50% of the observations
D)   The lower 25% and the upper 25% of the observations

Question 5

To locate the percentile for a given observation in a data set, the data must be

Accepted Answer

A)   Sorted and listed from the minimum to the maximum values.
B)   Displayed in a histogram.
C)   Summarized in a cumulative frequency distribution.
D)   Distributed symmetrically around the mean.

Question 6

A student scored in the 85th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

Accepted Answer

A) True 
 B)False

Question 7

The following graph is a

Accepted Answer

A)   Dot plot
B)   Stem-and-leaf display
C)   Box plot
D)   Scatter Plot

Question 8

A dot plot is useful for quickly graphing frequencies in a small data set.

Accepted Answer

A) True 
 B)False

Question 9

A dot plot is useful for showing possible outliers.

Accepted Answer

A) True 
 B)False

Question 10

For the following data, how many observations are in the data?

Accepted Answer

The answer of For the following data, how many observations...

Question 11

In a positively skewed distribution, the 50th percentile is the same as the _______________.

Accepted Answer

Question 12

Percentiles divide a distribution into

Accepted Answer

A)   2 equal parts.
B)   4 equal parts.
C)   10 equal parts.
D)   100 equal parts.

Question 13

Quartiles divide a distribution into

Accepted Answer

A)   2 equal parts.
B)   4 equal parts.
C)   10 equal parts.
D)   100 equal parts.

Question 14

In a stem-and-leaf display, the leaf represents a class of a frequency distribution.

Accepted Answer

A) True 
 B)False

Question 15

The "box" in a box plot shows the interquartile range.

Accepted Answer

A) True 
 B)False

Question 16

A dot plot is best applied for a data set with

Accepted Answer

A)   1,000 observations.
B)   50 observations.
C)   More than one variable.
D)   A one mode.

Question 17

A relationship between gender and preference for Coke or Pepsi can be best represented by a scatter diagram.

Accepted Answer

A) True 
 B)False

Question 18

In a distribution, the second quartile corresponds with the

Accepted Answer

A)   Mean.
B)   Median.
C)   Mode.
D)   Variance.

Question 19

For the following data, are any of the observations an outlier?

Accepted Answer

The answer of For the following data, are any of...

Question 20

What chart or graph uses dots to show frequencies? ________________

Accepted Answer

The answer of What chart or graph uses dots to...

Exam 4: Describing Data: Displaying and Exploring Data

The "box" in a box plot shows the interquartile range.

Correct AnswerverifiedShow Answer

What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17, median of 12 and standard deviation of 6?

Correct AnswerverifiedShow Answer

Quartiles divide a distribution into

Correct AnswerverifiedShow Answer

In a stem-and-leaf display, the leaf represents a class of a frequency distribution.

Correct AnswerverifiedShow Answer

A dot plot is best applied for a data set with

Correct AnswerverifiedShow Answer

A dot plot is useful for quickly graphing frequencies in a small data set.

Correct AnswerverifiedShow Answer

A relationship between gender and preference for Coke or Pepsi can be best represented by a scatter diagram.

Correct AnswerverifiedShow Answer

What statistic can be used to measure the relative symmetry of a distribution? ___________________________________

Correct AnswerverifiedCoefficien...View AnswerShow Answer

To locate the percentile for a given observation in a data set, the data must be

Correct AnswerverifiedShow Answer

The following graph is a

Correct AnswerverifiedShow Answer

What does the interquartile range describe?

Correct AnswerverifiedShow Answer

Percentiles divide a distribution into

Correct AnswerverifiedShow Answer

A student scored in the 85th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

Correct AnswerverifiedShow Answer

What chart or graph uses dots to show frequencies? ________________

Correct AnswerverifiedShow Answer

For the following data, are any of the observations an outlier?

Correct AnswerverifiedShow Answer

A dot plot is useful for showing possible outliers.

Correct AnswerverifiedShow Answer

For the following data, how many observations are in the data?

Correct AnswerverifiedShow Answer

In a distribution, the second quartile corresponds with the

Correct AnswerverifiedShow Answer

In a positively skewed distribution, the 50th percentile is the same as the _______________.

Correct AnswerverifiedShow Answer

The interquartile range is the distance between ___________.

Correct Answerverifiedthe first ...View AnswerShow Answer

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Coefficien...
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A student scored in the 85^th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

Correct Answer
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In a positively skewed distribution, the 50^th percentile is the same as the _______________.

Correct Answer
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the first ...
View Answer