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Exam 2: Charts and Graphs

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Question 1

Multiple Choice

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Monthly sales were tracked and shown on the graph below. Which of the following would be an incorrect conclusion based on this graph?

A) Sales were lowest in the month of March.
B) Sales increased between August and September.
C) The last month had higher sales than the first month.
D) Sales declined from June through August.
E) The last month had higher sales than September.

F) A) and B)
G) A) and E)

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Question 2

Multiple Choice

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Consider the relative frequency distribution given below: Class Interval Relative Frequency 20-under 40 0.2 40-under 60 0.3 60-under 80 0.4 80-under 100 0.1 There were 60 numbers in the data set.How many of the number were less than 80?

A) 90
B) 80
C) 0.9
D) 54
E) 100

F) A) and C)
G) A) and E)

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Question 3

Multiple Choice

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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 midpoint of the first class interval is ___.

The number of phone calls arriving at a switchboard each hour has been recorded, and the following frequency distribution has been developed: Class Interval Frequency 20-under 40 30 40-under 60 45 60-under 80 80 80-under 100 45 What is the cumulative frequency of the third class?

One advantage of a stem and leaf plot over a frequency distribution is that the values of the original data are retained.

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 total number of walk-in customers included in the study was ___.

For a company in gardening supplies business, the best graphical way to show the percentage of a total budget that is spent on each of a number of different expense categories is the stem and leaf plot.

Consider the following frequency distribution: Class Interval Frequency 10-under 20 15 20-under 30 25 30-under 40 10 What is the relative frequency of the first class?

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: Absences Number of Employees (Days) 0-under 10 - 10-under 20 - 20-under 30 - Which of the following might represent a problem with this set of intervals?

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

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 office staff at Oasis Quick 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 125-under 150 category was ___.

If both variables being analyzed are nominal data, the best method to reveal any potential connections between them would be with a __________.

Two other names for cross tabulations are ____________ and ____________.

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 2003. Approximately ___ corporations had capitalizations of $200,000,000 or less.

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 under $100 each was ___.

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 cumulative frequency of the second class interval is ___.

According to the following graphic the most common cause of PCB Failures is a ___.

To consider historical data as part of their decisions, management often uses time-series data.

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: Which of the following is true?