Question 1

Answer the question.
-What name is given to a statistical graph that plots three or more related quantities simultaneously?

Accepted Answer

A) Pictograph 
B) Three dimensional graph 
C) Contour map 
D) Multiple bar graph 
A) Pictograph 
B) Three dimensional graph 
C) Contour map 
D) Multiple bar graph

Question 2

In order to answer the given question, which of the following types of study would be the most appropriate: an
experiment without blinding, an experiment with single blinding, an experiment with double blinding, an observational
study, or a case-control study?
-How do lawyers' salaries compare to doctors' salaries?

Accepted Answer

A) Experiment without blinding 
B) Experiment with double blinding 
C) Observational study 
D) Experiment with single blinding 
E) Case-control study 
A) Experiment without blinding 
B) Experiment with double blinding 
C) Observational study 
D) Experiment with single blinding 
E) Case-control study

Question 3

Determine whether the study involves selection bias, participation bias, both selection bias and participation bias, orneither.
-You are interested in the percentage of people in your city who favor tax cuts. You interview every twentieth person as they leave the church in your neighborhood.

Accepted Answer

A) Participation bias 
B) Selection bias 
C) No bias 
D) Participation bias and selection bias 
A) Participation bias 
B) Selection bias 
C) No bias 
D) Participation bias and selection bias

Question 4

Use the graph to answer the question.
-This double-bar graph shows the number of male (M)and female (F)athletes at a
university over a four-year period.   Compare the trend in the number of male athletes during the four-year period and the
trend in the number of female athletes during the four-year period .

Accepted Answer

The number of male athletes in

Question 5

Solve the problem.
-For the study described below, identify the sample. A researcher is interested in the level of stress among emergency-room nurses in the U.S. 275
Emergency-room nurses were interviewed to determine their level of stress. Each nurse was
Assigned a stress rating based on his or her answers to a number of questions. The average stress
Rating for the 275 nurses was determined.

Accepted Answer

A) The 275 emergency-room nurses interviewed 
B) All emergency-room nurses in the U.S. 
C) The questionnaire given to the 275 emergency-room nurses interviewed 
D) The average stress rating for the 275 emergency-room nurses interviewed 
A) The 275 emergency-room nurses interviewed 
B) All emergency-room nurses in the U.S. 
C) The questionnaire given to the 275 emergency-room nurses interviewed 
D) The average stress rating for the 275 emergency-room nurses interviewed

Question 6

A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameterof interest and answer the question.
-The CEO of a company claims that $90 \%$ of its employees have very high job satisfaction. A poll of the company's employees revealed that 87 percent had very high job satisfaction with a margin of error of $4.6$ percentage points. Can we conclude that the CEO was lying?

Accepted Answer

A)  $82.4 \%$ to $87 \%$; yes 
B)  $87 \%$ to $91.6 \%$; no 
C)  $82.4 \%$ to $91.6 \%$; no 
D)  $84.7 \%$ to $89.3 \%$; yes 
A)  $82.4 \%$ to $87 \%$; yes 
B)  $87 \%$ to $91.6 \%$; no 
C)  $82.4 \%$ to $91.6 \%$; no 
D)  $84.7 \%$ to $89.3 \%$; yes

Question 7

Use the graph to answer the question.
-The following time-series diagram tracks the performance of two stocks during the month
of October.   Describe the overall trend in the value of each stock during the month of October. By what
percentage did the value of each stock increase or decrease during the month of October?

Accepted Answer

The value of stock 1 fluctuated during d

Question 8

In order to answer the given question, which of the following types of study would be the most appropriate: an
experiment without blinding, an experiment with single blinding, an experiment with double blinding, an observational
study, or a case-control study?
-Does an hour of meditation per day lower blood pressure?

Accepted Answer

A) Observational study 
B) Experiment with double blinding 
C) Experiment with single blinding 
D) Experiment without blinding 
E) Case-control study 
A) Observational study 
B) Experiment with double blinding 
C) Experiment with single blinding 
D) Experiment without blinding 
E) Case-control study

Question 9

Construct a line chart for the data.
-A medical researcher recorded the ages of patients who had strokes caused by stress. The ages of 34 patients are summarized in the table below: $\begin{array}{l|c}
\text { Age (years) } & \text { Frequency } \
\hline 23-27 & 3 \
28-32 & 3 \
33-37 & 6 \
38-42 & 4 \
43-47 & 5 \
48-52 & 3 \
53-57 & 5 \
58-62 & 5
\end{array}$

Accepted Answer

A) 
  
B) 
  
C) 
  
D)  None of the above 
A) 
  
B) 
  
C) 
  
D)  None of the above

Question 10

Identify the variable as either qualitative or quantitative.
-The political affiliations of residents of a city

Accepted Answer

A) Quantitative 
B) Qualitative 
A) Quantitative 
B) Qualitative

Answer the question. -What name is given to a statistical graph that plots three or more related quantities simultaneously?

Determine whether the study involves selection bias, participation bias, both selection bias and participation bias, orneither. -You are interested in the percentage of people in your city who favor tax cuts. You interview every twentieth person as they leave the church in your neighborhood.

Construct a line chart for the data. -A medical researcher recorded the ages of patients who had strokes caused by stress. The ages of 34 patients are summarized in the table below: Age (years) Frequency 23-27 3 28-32 3 33-37 6 38-42 4 43-47 5 48-52 3 53-57 5 58-62 5

Identify the variable as either qualitative or quantitative. -The political affiliations of residents of a city

Thinking Critically

Approaches to Problem Solving

Numbers in the Real World

Managing Money

Putting Statistics to Work

Probability: Living With the Odds

Exponential Astonishment

Modeling Our World

Modeling With Geometry

Mathematics and the Arts

Filters

Exam 5: Statistical Reasoning