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Exam 2: Organizing and Visualizing Data

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Question 51

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Abel Alonzo, Director of Human Resources, is exploring employee absenteeism at the Harrison Haulers Plant during the last operating year. A review of all personnel records indicated that absences ranged from zero to twenty-nine days per employee. The following class intervals were proposed for a frequency distribution of absences. Which of the following represents a problem with this set of intervals?

A) There are too few intervals.
B) Some numbers between 0 and 29, inclusively, would not fall into any interval.
C) The first and second interval overlaps.
D) There are too many intervals.
E) The second and the third interval overlap.

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Question 52

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Which of the following would be most helpful in constructing a pie chart?

A) cumulative percent
B) relative frequency
C) ogive
D) frequency
E) none of the above

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Question 53

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A summary of data in which raw data are grouped into different intervals and the number of items in each group is listed is called a frequency distribution.

Each day, the manager at Jamie's Auto Care Shop prepares a frequency distribution and a histogram of sales transactions by dollar value of the transactions. Friday's histogram follows: On Friday, the approximate number of sales transactions in the 75-under 100 category was ___.

A Pareto chart and a pie chart are both types of categorical graphs.

The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a frequency histogram of waiting time for drive up ATM customers. Approximately ___ drive up ATM customers waited less than 2 minutes.

In a frequency distribution, the first class interval begins at 18. The midpoint of the first class interval is 19.5, and the midpoint of the last class interval is 49.5. How many class intervals are there?

One rule that must always be followed in constructing frequency distributions is that the adjacent classes must overlap.

The staff of Ms. Tamara Hill, VP of Technical Analysis at Blue Sky Brokerage, prepared a frequency histogram of market capitalization of the 937 corporations listed on the American Stock Exchange in January 2013. Approximately ___ corporations had capitalization exceeding $200,000,000.

The customer help center in your company receives calls from customers who need help with some of the customized software solutions your company provides. The staff prepare the following cumulative frequency polygon (ogive) for waiting times during the last three months. What percentage of customers had waiting times exceeding 6 minutes?

Each day, the manager at Jamie's Auto Care prepares a frequency distribution and a histogram of sales transactions by dollar value of the transactions. Friday's histogram follows: On Friday, the approximate number of sales transactions between $150 and $175 was ___.

A scatter plot shows how the numbers in a data set are scattered around their average.

Consider the following frequency distribution: What is the relative frequency of the first class?

The 2010 and 2012 market share data of the three competitors (Alston, Baren, and Clemson) in an oligopolistic industry are presented in the following pie charts. Total sales for this industry were $1.5 billion in 2010 and $1.8 billion in 2012. Baren's sales in 2010 were ___.

According to the following graphic, "Bent Pins" account for ___% of PCB Failures.