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Exam 2: Graphs,Charts and Tablesdescribing Your Data

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Question 61

Multiple Choice

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A histogram is most commonly used to analyze which of the following?

A) Nominal level data
B) Quantitative data
C) Time-series data
D) Ordinal data

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Question 62

Multiple Choice

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Which of the following questions CANNOT be answered using a scatter diagram?

A) What is the trend over time of each of the 2 variables?
B) Is there a curved or linear relation between the 2 variables?
C) Is there a weak or strong relation between the 2 variables?
D) Is there a positive or negative relation between the 2 variables?

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Question 63

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An ogive is a graph that shows cumulative relative frequency.

If a manager is interested in analyzing the relationship between the age of customers and the dollar volume of business that is done in the store,a relative frequency distribution would be most appropriate.

It is often a good idea to convert frequency distributions to relative frequency distributions when you wish to compare two distributions with different amounts of data.

The J.B.Hanson Company is interested in analyzing the relationship between end-of-the-week inventory levels and sales for the same week.The graph that most likely would be used to show this relationship is a histogram.

The Wilson company monitors customer complaints and organizes these complaints into six distinct categories.Over the past year,the company has received 534 complaints.One possible graphical method for representing these data would be a histogram.

The Fitness Center manager has collected data on the number of visits to the club each week for the past 8 weeks.These data are shown as follows.Which of the following statements is most correct?

The appropriate number of classes should generally be between 5 and 20.

When using the Histogram tool in Excel to construct a frequency distribution and histogram,the bins represent the upper class limits.

In constructing a frequency distribution for the savings account balances for customers at a bank,the following class boundaries might be acceptable if the minimum balance is $5.00 and the maximum balance is $18,700: $0.00 - $5,000 $5,000 - 10,000 $10,000 - $15,000 $15,000 - $20,000

Recently a survey was conducted in which customers of a large insurance company were asked to indicate the number of speeding tickets they had received in the past three years.The minimum value in the data was zero and the largest was six tickets.If you wished to illustrate the proportion of people who had three or fewer tickets,you would most likely construct a cumulative relative frequency distribution.

Which of the following is true about the difference between stem and leaf diagrams and histograms?

To show the relationship between amount of rainfall and the number of car accidents,the best type of graph to use is a scatter diagram.

Sawyer & Company is a law firm in Dallas,Texas.Recently,the administrative manager prepared a report for the managing partners that showed the number of court cases handled by the firm monthly over the past three years.It was appropriate for her to use a line chart in this case.

The city counsel has just voted to pass the city's budget for next year.If you were writing a report describing the budget so the citizens could understand how the total tax dollars will be spent,which of the following graphs might be most appropriate?

Histograms cannot have gaps between the bars,whereas bar charts can have gaps.

Which of the following is a false statement?

A study was recently conducted by the regional electric and gas company.Data were collected for three customer categories showing the dollar amount of natural gas and the dollar amount of electricity consumed during the year.Which of the following graphs would most likely be used to display both sets of data together?

Many Walmart stores have automotive departments where customers can buy tires,have their vehicles serviced,and obtain other automotive services.Recently,the manager at an Ohio Walmart collected data on the time customers had to wait to get the desired automotive service.Of the 500 cars in the sample,the shortest time any customer spent waiting was 3 minutes and the longest time was 183 minutes.Assuming that the manager wishes to develop a frequency distribution with 9 classes,which of the following would be an appropriate class width for each class?