Question 1

True or False: Apple Computer, Inc.collected information on the age of their customers.
Suppose the youngest customer was 12 and the oldest was 72.To study the percentage of their
customers who are below a certain age, it can use an ogive.

Accepted Answer

An ogive is a graph that represents the cumulative frequency or cumulative percentage of data, which is useful for determining the percentage of customers below a certain age.

Question 2

True or False: A side-by-side bar chart is two histograms plotted side-by-side.

Accepted Answer

A side-by-side bar chart displays bars for different categories next to each other for comparison, while histograms show the distribution of numerical data.

Question 3

True or False: Ogives are plotted at the midpoints of the class groupings.

Accepted Answer

Ogives are plotted at the upper class boundaries, not the midpoints of the class groupings.

Question 4

True or False: Apple Computer, Inc.collected information on the age of their customers.
Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the
age among its customers, it is best to use a pie chart.

Accepted Answer

A pie chart is not ideal for showing the distribution of ages. A histogram or box plot would be better suited for displaying the distribution of continuous data like age.

Question 5

True or False: If you wish to construct a graph of a relative frequency distribution, you would
most likely construct an ogive first.

Accepted Answer

An ogive is used to represent cumulative frequency, not relative frequency. A bar graph or histogram is typically used for relative frequency distributions.

Question 6

True or False: The stem-and-leaf display is often superior to the frequency distribution in that
it maintains the original values for further analysis.

Accepted Answer

The stem-and-leaf display retains the original data values, allowing for more detailed analysis and reconstruction of the data set, unlike a frequency distribution which summarizes data into intervals.

Question 7

True or False: Apple Computer, Inc.collected information on the age of their customers.
Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the
age among its customers, it can use a Pareto chart.

Accepted Answer

A Pareto chart is used to display categorical data, not continuous data like age. A histogram would be more appropriate for studying the distribution of ages.

Question 8

True or False: A Walmart store in a small town monitors customer complaints and organizes
these complaints into six distinct categories.Over the past year, suppose the company has
received 534 complaints.One possible graphical method for representing these data would be a
Pareto chart.

Accepted Answer

A Pareto chart is suitable for displaying categorical data, such as customer complaints, by showing the frequency of each category in descending order, helping to identify the most significant issues.

Question 9

True or False: Percentage polygons are plotted at the boundaries of the class groupings.

Accepted Answer

Percentage polygons are plotted at the midpoints of the class intervals, not at the boundaries.

Question 10

True or False: In general, a frequency distribution should have at least 8 class groups but no
more than 20.

Accepted Answer

The answer of True or False: In general, a frequency...

Question 11

True or False: The original data values cannot be determined once they are grouped into a
frequency distribution table.

Accepted Answer

Once data is grouped into a frequency distribution table, individual data values are lost, and only the frequency of data within each interval is retained.

Question 12

True or False: Histograms are used for numerical data while bar charts are suitable for
categorical data.

Accepted Answer

Histograms display the distribution of numerical data by grouping values into bins, while bar charts compare different categories using rectangular bars.

Question 13

True or False: The percentage distribution cannot be constructed from the frequency
distribution directly.

Accepted Answer

A percentage distribution can be constructed from a frequency distribution by converting the frequencies into percentages of the total frequency.

Question 14

True or False: The relative frequency is the frequency in each class divided by the total number
of observations.

Accepted Answer

The relative frequency is calculated by dividing the frequency of each class by the total number of observations, showing the proportion of the total that each class represents.

Question 15

True or False: A histogram can have gaps between the bars, whereas bar charts cannot have
gaps.

Accepted Answer

A histogram typically does not have gaps between bars as it represents continuous data, while bar charts can have gaps since they represent categorical data.

Question 16

True or False: An ogive is a cumulative percentage polygon.

Accepted Answer

An ogive is a graph that represents the cumulative frequency or cumulative percentage of data, typically used to show how many data points fall below a particular value.

Question 17

True or False: The main principle behind the Pareto chart is the ability to separate the "vital
few" from the "trivial many."

Accepted Answer

The Pareto chart is based on the Pareto Principle, which suggests that a small number of causes (the "vital few") are responsible for a large portion of the effect, while the majority (the "trivial many") have a smaller impact.

Question 18

True or False: Apple Computer, Inc.collected information on the age of their customers.
Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the
age among its customers, it can use a percentage polygon.

Accepted Answer

A percentage polygon is a graphical representation that can be used to study the distribution of data, such as customer ages, by showing the percentage of observations that fall within certain intervals.

Question 19

True or False: A good choice for the number of class groups to use in constructing frequency
distribution is to have at least 5 but no more than 15 class groups.

Accepted Answer

This range is generally recommended to balance detail and simplicity, allowing for a clear representation of data without overwhelming complexity.

Question 20

True or False: Determining the class boundaries of a frequency distribution is highly
subjective.

Accepted Answer

Determining the class boundaries of a frequency distribution is subjective because there is no one right way to do it. The researcher must use their judgment to decide where to place the boundaries, and this can lead to different results depending on the researcher's individual preferences.

Quiz 2: Organizing and Visualizing

True or False: Apple Computer, Inc.collected information on the age of their customers. Suppose the youngest customer was 12 and the oldest was 72.To study the percentage of their customers who are below a certain age, it can use an ogive.

True or False: A side-by-side bar chart is two histograms plotted side-by-side.

True or False: Ogives are plotted at the midpoints of the class groupings.

True or False: Apple Computer, Inc.collected information on the age of their customers. Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers, it is best to use a pie chart.

True or False: If you wish to construct a graph of a relative frequency distribution, you would most likely construct an ogive first.

True or False: The stem-and-leaf display is often superior to the frequency distribution in that it maintains the original values for further analysis.

True or False: Apple Computer, Inc.collected information on the age of their customers. Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers, it can use a Pareto chart.

True or False: A Walmart store in a small town monitors customer complaints and organizes these complaints into six distinct categories.Over the past year, suppose the company has received 534 complaints.One possible graphical method for representing these data would be a Pareto chart.

True or False: Percentage polygons are plotted at the boundaries of the class groupings.

True or False: In general, a frequency distribution should have at least 8 class groups but no more than 20.

True or False: The original data values cannot be determined once they are grouped into a frequency distribution table.

True or False: Histograms are used for numerical data while bar charts are suitable for categorical data.

True or False: The percentage distribution cannot be constructed from the frequency distribution directly.

True or False: The relative frequency is the frequency in each class divided by the total number of observations.

True or False: A histogram can have gaps between the bars, whereas bar charts cannot have gaps.

True or False: An ogive is a cumulative percentage polygon.

True or False: The main principle behind the Pareto chart is the ability to separate the "vital few" from the "trivial many."

True or False: Apple Computer, Inc.collected information on the age of their customers. Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers, it can use a percentage polygon.

True or False: A good choice for the number of class groups to use in constructing frequency distribution is to have at least 5 but no more than 15 class groups.

True or False: Determining the class boundaries of a frequency distribution is highly subjective.