Question 1

A researcher wishes to estimate the textbook costs of first-year students at Barry University. To do so, he recorded the textbook cost of 300 first-year students and found that their average textbook cost was $195 per semester. The variable of interest to the researcher is

Accepted Answer

A)  textbook cost. 
B)  class rank. 
C)  number of students. 
D)  name of university.

Question 2

In a histogram, each observation is assigned to one or more classes.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements about pie charts is false?

Accepted Answer

A)  A pie chart is a graphical representation of a relative frequency distribution. 
B)  You can always determine frequencies for each category by looking at a pie chart. 
C)  The total percentage of all the slices of a pie chart is 100%. 
D)  The area of a slice of a pie chart is the proportion of all the individuals that fall into that particular category.

Question 4

An individual's income depends somewhat on their number of years of education. Accordingly, we identify income as the ____________________ variable, and years of education as the ____________________ variable.

Accepted Answer

The answer of An individual's income depends somewhat on their...

Question 5

A(n) ____________________ histogram has two peaks, not necessarily equal in height.

Accepted Answer

The answer of A(n) ____________________ histogram has two peaks, not...

Question 6

Which of the following statements describes a line chart?

Accepted Answer

A)  A line chart is a graph of time-series data. 
B)  A line chart is a plot of a variable over time. 
C)  The horizontal axis of a line chart contains time periods. 
D)  All of these choices are true.

Question 7

Which of the following describes a positive linear relationship between X and Y?

Accepted Answer

A)  As the X values increase, the Y values increase in a linear manner. 
B)  As the X values decrease, the Y values decrease in a linear manner. 
C)  The X and Y values move uphill together in a linear manner. 
D)  All of these choices are true.

Question 8

For which type of data are the values arbitrary numbers?

Accepted Answer

A)  Interval data 
B)  Nominal data 
C)  Ordinal data 
D)  None of these choices.

Question 9

Which of the following represents time-series data?

Accepted Answer

A)  The length of time each of the top 100 stocks have been available on the NYSE. 
B)  The most popular time of year that people purchase the top 100 stocks on the NYSE. 
C)  The value of the #1 stock on the NYSE each month over a one-year period. 
D)  All of these choices are true.

Question 10

-The line chart below shows cucumber prices fluctuated from $2.00 per pound to over $4.50 per pound during the year.

Accepted Answer

A) True 
 B)False

Question 11

Provide one example of ordinal data; one example of nominal data; and one example of interval data.

Accepted Answer

The answer of Provide one example of ordinal data; one...

Question 12

Which situation identifies when to use pie charts and/or bar charts?

Accepted Answer

A)  You want to describe a single set of data. 
B)  Your data is nominal. 
C)  You want to show the number or the percentage of individuals in each category. 
D)  All of these choices are true.

Question 13

Interval data may be treated as ordinal or nominal.

Accepted Answer

A) True 
 B)False

Question 14

From a pie chart you are able to find the frequency for each category.

Accepted Answer

A) True 
 B)False

Question 15

A(n) ____________________ chart is often used to display frequencies; a(n) ____________________ chart graphically shows relative frequencies.

Accepted Answer

The answer of A(n) ____________________ chart is often used to...

Question 16

The Chief of Police conducted a survey of the officers on his squad. An officer's shooting score at target practice is an example of a(n) ____________________ variable.

Accepted Answer

The answer of The Chief of Police conducted a survey...

Question 17

A(n) ____________________ is a graphical display consisting of a set of points, each point representing one variable measured along the horizontal axis, and another variable measured along the vertical axis.

Accepted Answer

The answer of A(n) ____________________ is a graphical display consisting...

Question 18

Data for calories and salt content (milligrams of sodium) in 17 brands of meat hot dogs are shown in the scatter diagram below. According to this diagram, it appears that hot dogs that are high in sodium are generally low in calories, and hot dogs with low sodium are generally high in calories.

Accepted Answer

A) True 
 B)False

Question 19

The values of quantitative data are categories.

Accepted Answer

A) True 
 B)False

Question 20

It is speculated that the number of police officers has a negative linear relationship with number of crimes. Explain why this might be so.

Accepted Answer

The answer of It is speculated that the number of...

Exam 2: Graphical and Tabular Descriptive Techniques

A researcher wishes to estimate the textbook costs of first-year students at Barry University. To do so, he recorded the textbook cost of 300 first-year students and found that their average textbook cost was $195 per semester. The variable of interest to the researcher is

In a histogram, each observation is assigned to one or more classes.

Which of the following statements about pie charts is false?

An individual's income depends somewhat on their number of years of education. Accordingly, we identify income as the variable, and years of education as the variable.

A(n) ____________________ histogram has two peaks, not necessarily equal in height.

Which of the following statements describes a line chart?

Which of the following describes a positive linear relationship between X and Y?

For which type of data are the values arbitrary numbers?

Which of the following represents time-series data?

-The line chart below shows cucumber prices fluctuated from $2.00 per pound to over $4.50 per pound during the year.

Provide one example of ordinal data; one example of nominal data; and one example of interval data.

Which situation identifies when to use pie charts and/or bar charts?

Interval data may be treated as ordinal or nominal.

From a pie chart you are able to find the frequency for each category.

A(n) chart is often used to display frequencies; a(n) chart graphically shows relative frequencies.

The Chief of Police conducted a survey of the officers on his squad. An officer's shooting score at target practice is an example of a(n) ____________________ variable.

A(n) ____________________ is a graphical display consisting of a set of points, each point representing one variable measured along the horizontal axis, and another variable measured along the vertical axis.

Data for calories and salt content (milligrams of sodium) in 17 brands of meat hot dogs are shown in the scatter diagram below. According to this diagram, it appears that hot dogs that are high in sodium are generally low in calories, and hot dogs with low sodium are generally high in calories.

The values of quantitative data are categories.

It is speculated that the number of police officers has a negative linear relationship with number of crimes. Explain why this might be so.