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Exam 2: Charts and Graphs

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Question 41

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For any given data set, a frequency distribution with a larger number of classes will always be better than the one with a smaller number of classes.

A) True
B) False

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Question 42

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The 2019 and 2020 market share data of the three competitors (A, B, and C) in an oligopolistic industry are presented in the following pie charts.Total sales for this industry were $1.5 billion in 2019 and $1.8 billion in 2020.Company C's sales in 2020 were ___.

A) $342 million
B) $630 million
C) $675 million
D) $828 million
E) $928 million

F) D) and E)
G) A) and D)

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Question 43

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

The following time-series data shows the average number of vacation days taken each year by employees. 2010 22 2011 25 2012 26 2013 29 2014 24 2015 21 2016 22 2017 20 2018 19 The most effective visualization of these data would be:

Consider the following stem and leaf plot: Stem Leaf 1 0, 2, 5, 7 2 2, 3, 4, 4 3 0, 4, 6, 6, 9 4 5, 8, 8, 9 5 2, 7, 8 Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.) .What would the frequency be for class 30-under 40?

A cumulative frequency distribution provides a running total of the frequencies in the classes.

Consider the following frequency distribution: Class Interval Frequency 100-under 200 25 200-under 300 45 300-under 400 30 What is the relative frequency of the second class interval?

A shirt production company has tracked their production since the company started in 1999.The graph of their annual production is shown. After 2005, in what year did production recover and surpass the production level of 2005?

An instructor has decided to graphically represent the grades on a test.The instructor uses a plus/minus grading system (i.e., she gives grades of A-, B+, etc.) .Which of the following would provide the most information for the students?

Consider the following stem and leaf plot: Stem Leaf 1 0, 2, 5, 7 2 2, 3, 4, 8 3 0, 4, 6, 6, 9 4 5, 8, 8, 9 5 2, 7, 8 Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.) .What was the highest number in the data set?

A graphical representation of a frequency distribution is called a pie chart.

Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system, and orders an inspection of "each and every payroll voucher issued since January 1, 2000." Each payroll voucher was inspected and the following frequency distribution was compiled. Errors per Voucher Number of Vouchers 0-under 2 500 2-under 4 400 4-under 6 300 6-under 8 200 8-under 10 100 The relative frequency of the first class interval is ___.

To show hourly sales throughout a day, a ________ chart would be most effective, and a _________ chart would be more effective at showing what products were sold during that day.

If the individual class frequency is divided by the total frequency, the result is the median frequency.

When looking at a scatter plot, if a trend can be discerned between changes in one variable that appear to be related to changes in the other variable, there is likely a relationship between the two variables.

The point of "cleaning" time-series data is to be sure all the data are accurate.

Visualization of time-series data is considered descriptive business analytics.

The staff of Mr.Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a cumulative frequency ogive of waiting time for walk-in customers. The percentage of walk-in customers waiting one minute or less was ___.

A person has decided to construct a frequency distribution for a set of data containing 60 numbers.The lowest number is 23 and the highest number is 68.If 7 classes are used, the class width should be approximately ___.

Each day, the office staff at Oasis Quick Shop prepares a frequency distribution and an ogive of sales transactions by dollar value of the transactions.Saturday's cumulative frequency ogive follows: The percentage of sales transactions on Saturday that were at least $100 each was ___.