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Exam 2: Visualizing Data With Charts and Graphs

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Question 61

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Consider a scatterplot showing the relationship between years of formal education and life expectancy.Which of the following statements is false?

A) If more years of formal education are correlated with higher life expectancy, then the scatterplot would exhibit a positive slope.
B) If more years of formal education are not correlated with higher life expectancy, then the scatterplot would exhibit a flat slope.
C) If more years of formal education are not correlated with higher life expectancy, then the scatterplot would exhibit a flat or negative slope.
D) If more years of formal education are negatively correlated with higher life expectancy, then the scatterplot would exhibit a negative slope.
E) If other research shows a causal effect between years of formal education and higher life expectancy (additional years of formal education cause a higher life expectancy) , then the scatterplot could not be flat.

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

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Question 62

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

A) True
B) False

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Question 63

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Consider the relative frequency distribution given $\begin{array} { l c } \text { Class Interval } & \text { Relative Frequency } \\\text { 20-under } 40 & 0.2 \\40 \text {-under } 60 & 0.3 \\60 \text {-under } 80 & 0.4 \\\text { 80-under } 100 & 0.1\end{array}$ There were 60 numbers in the data set.How many numbers were in the interval 20-under 40?

Consider the following frequency distribution: $\begin{array} { l c } \text { Class Interval } & \text { Frequency } \\100 \text {-under } 200 & 25 \\200 \text {-under } 300 & 45 \\300 \text {-under } 400 & 30\end{array}$ What is the midpoint of the last 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?

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 at least 7 minutes.

A shirt production company has tracked their sales of red and blue shirts over the past few years.The graph of both is shown below. Which of the following is a true statement about the trends in sales?

Scott Brim, Chief Financial Officer of Space Mall, Inc., wants to better understand the busiest business hours during the weekend.There are door sensors that approximate the number of people who enter the mall.The table below presents the average number of people coming in during the weekend, for the last month each hour: $\begin{array} { r c } \text { Hour } & \text { Number of People } \\\text { 9-under 10 } & 350 \\\text { 10-under 11 } & 400 \\\text { 11-under 12 } & 300 \\\text { 12-under 1 } & 650 \\\text { 1-under 2 } & 550 \\\text { 2-under 3 } & 400 \\\text { 3-under 4 } & 350 \\\text { 4-under 5 } & 450 \\\text { 5-under 6 } & 250 \\\text { 6-under 7 } & 300 \\\text { 7-under 8 } & 200 \\\text { 8-under 9 } & 300\end{array}$ The relative frequency of the fourth class interval is _________.

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 2019. Enlarged chart below and same chart in question 65 is also made larger, per suggestion Approximately ________ corporations had capitalization exceeding $200,000,000.

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.

The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school: $\begin{array}{c}\begin{array}{lll}\text {Salary }\\(\$1,000s) \\\text {28 -under 31}\\\text {31-under 35}\\\text {34 -under 37}\\\text {39-under 40}\end{array}\begin{array}{c}\text { Number of Graduates }\\\\-\\-\\-\\-\\\end{array}\end{array}$ Before data were collected, someone questioned the validity of this arrangement.Which of the following represents a problem with this set of intervals?

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 _____________.

The staff of the accounting and the quality control departments rated their respective supervisor's leadership style as either (1) authoritarian or (2) participatory.Sixty-eight percent of the accounting staff rated their supervisor "authoritarian," and thirty-two percent rated him/her "participatory." Forty percent of the quality control staff rated their supervisor "authoritarian," and sixty percent rated him/her "participatory." The best graphic depiction of these data would be two ___________________.