Exam 2: Descriptive Statistics and Analytics: Tabular and Graphical Methods

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24, 56, 43, 35, 37, 27, 29, 44, 34, 28, 33, 28, 46, 31, 38, 41, 48, 38, 27, 29, 37, 33, 31, 40, 50 Construct a histogram.

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Question 1

Correct Answer:

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Construct a frequency table. You can use five to seven classes, depending on your choice and calculation of length as a whole integer.
While the frequency table and histogram shown above are technically valid, it is unlikely that a student would create them based on the instructions in the textbook. A more likely frequency table a student might create would be:
A histogram could easily be derived from this frequency table.

Which of the following is the best analytic dashboard graphical method for visualizing hierarchical information?

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Question 2

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A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. What would be the approximate shape of the relative frequency histogram?

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Question 3

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In a Pareto chart, the bar for the "Other" category should be placed to the far left of the chart.

(True/False)

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Question 4

Gauges feature a single measure showing variation over time.

(True/False)

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Question 5

A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. What is the relative frequency for the class with the greatest frequency?

(Multiple Choice)

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Question 6

A company's Chief Operating Officer (COO) keeps track of the mileage on her trips from her office at corporate headquarters to the company's off-site manufacturing facility and its nearby suppliers. The stem-and-leaf display of the data for one year is below. In developing a histogram of these data, how many classes would be used?

(Multiple Choice)

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Question 7

At the end of their final exam, 550 students answered an additional question in which they rated their instructor's teaching effectiveness, with the following results. What proportion of the students who rated their instructor as very or somewhat effective received a C or lower in the class?

(Multiple Choice)

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Question 8

Which one of the following graphical tools is used with quantitative data?

(Multiple Choice)

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Question 9

A scatter plot can be used to identify outliers.

(True/False)

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Question 10

At the end of their final exam, 550 students answered an additional question in which they rated their instructor's teaching effectiveness, with the following results. What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

(Multiple Choice)

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Question 11

If there are 30 values in a data set, how many classes should be created for a frequency histogram?

(Multiple Choice)

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Question 12

822 recently purchased books were randomly selected from all recent book purchases over the Internet. The chart below shows the breakdown of the classification of the book type. What percentage of the books in the sample were either mystery or science fiction/fantasy?

(Multiple Choice)

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Question 13

If there are 62 values in a data set, how many classes should be created for a frequency histogram?

(Multiple Choice)

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Question 14

A company's Chief Operating Officer (COO) keeps track of the mileage on her trips from her office at corporate headquarters to the company's off-site manufacturing facility and its nearby suppliers. The stem-and-leaf display of the data for one year is below. What would be the class length for creating the frequency histogram?

(Multiple Choice)

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Question 15

The following is a relative frequency distribution of grades in an introductory statistics course. If we wish to depict these data using a pie chart, find how many degrees (out of 360 degrees) should be assigned to each grade.

(Short Answer)

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Question 16

The following data consist of the number of sick days taken by the 100 employees at a small manufacturing company for the past 18 months. Construct a dot plot of these data and describe the distribution. 5, 1, 4, 8, 0, 6, 3, 5, 3, 4, 7, 15, 5, 8, 2, 1, 5, 4

(Short Answer)

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Question 17

A graphical portrayal of a quantitative data set that divides the data into classes and gives the frequency of each class is a(n) ________.

(Multiple Choice)

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Question 18

An example of manipulating a graphical display to distort reality is ________.

(Multiple Choice)

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Question 19

Leaves on a stem-and-leaf display should be rearranged so that they are in increasing order from left to right.

(True/False)

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Question 20

Showing 1 - 20 of 120

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24, 56, 43, 35, 37, 27, 29, 44, 34, 28, 33, 28, 46, 31, 38, 41, 48, 38, 27, 29, 37, 33, 31, 40, 50 Construct a histogram.

Which of the following is the best analytic dashboard graphical method for visualizing hierarchical information?

A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. What would be the approximate shape of the relative frequency histogram?

In a Pareto chart, the bar for the "Other" category should be placed to the far left of the chart.

Gauges feature a single measure showing variation over time.

A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. What is the relative frequency for the class with the greatest frequency?

At the end of their final exam, 550 students answered an additional question in which they rated their instructor's teaching effectiveness, with the following results. What proportion of the students who rated their instructor as very or somewhat effective received a C or lower in the class?

Which one of the following graphical tools is used with quantitative data?

A scatter plot can be used to identify outliers.

At the end of their final exam, 550 students answered an additional question in which they rated their instructor's teaching effectiveness, with the following results. What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

If there are 30 values in a data set, how many classes should be created for a frequency histogram?

822 recently purchased books were randomly selected from all recent book purchases over the Internet. The chart below shows the breakdown of the classification of the book type. What percentage of the books in the sample were either mystery or science fiction/fantasy?

If there are 62 values in a data set, how many classes should be created for a frequency histogram?

The following is a relative frequency distribution of grades in an introductory statistics course. If we wish to depict these data using a pie chart, find how many degrees (out of 360 degrees) should be assigned to each grade.

The following data consist of the number of sick days taken by the 100 employees at a small manufacturing company for the past 18 months. Construct a dot plot of these data and describe the distribution. 5, 1, 4, 8, 0, 6, 3, 5, 3, 4, 7, 15, 5, 8, 2, 1, 5, 4

A graphical portrayal of a quantitative data set that divides the data into classes and gives the frequency of each class is a(n) ________.

An example of manipulating a graphical display to distort reality is ________.

Leaves on a stem-and-leaf display should be rearranged so that they are in increasing order from left to right.

An Introduction to Business Statistics and Analytics

Descriptive Statistics and Analytics: Numerical Methods

Probability and Probability Models

Predictive Analytics I: Trees, K-Nearest Neighbors, Naive Bayes,

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Predictive Analytics Ii: Logistic Regression, Discriminate Analysis,

Time Series Forecasting and Index Numbers

Nonparametric Methods

Decision Theory

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