Question 1

Answer as requested.
-Which of the following pairs of variables is likely to have a negative correlation?

Accepted Answer

A) The unemployment rate and the number of homeless people 
B) The price of jet fuel and the price of airline tickets. 
C) Height and weight. 
D) Interest rates and the number of real estate transactions 
A) The unemployment rate and the number of homeless people 
B) The price of jet fuel and the price of airline tickets. 
C) Height and weight. 
D) Interest rates and the number of real estate transactions

Question 2

Answer the question.
-What name is given to a statistical graph where each category has its own wedge and the wedges are displayed on top of one another?

Accepted Answer

A) Multiple bar graph 
B) Pictograph 
C) Stack plot 
D) Contour map 
A) Multiple bar graph 
B) Pictograph 
C) Stack plot 
D) Contour map

Question 3

Describe how you would apply the five basic steps of a statistical study to the given issue.
-You want to know the percentage of adults in the U.S. who have ever sought treatment
from a practitioner of complementary medicine.

Accepted Answer

Step 1: Population is all adults in the

Question 4

The graph below shows the approximate annual percentage growth rate in world population for the years 1960 through
2010. Data is estimated by the UN Census Bureau.   Use the graph to answer the question.
-In which year(s), if any, during the period 1960-2010 is world population constant?

Accepted Answer

A) None 
B) 1962-1964 
C) 1962-1964, 1969-1971, 1975-1980 
D) 1969-1971 
A) None 
B) 1962-1964 
C) 1962-1964, 1969-1971, 1975-1980 
D) 1969-1971

Question 5

Answer the question.
-Which of the following study results implies that there is a problem with the quality of education at Rydell High?

Accepted Answer

A) 30% of the senior class scored above average on the writing portion of a national aptitude test. 
B) 83% of the seniors who applied for admission to Valley State College were accepted. 
C) 25% of the senior class scored below average on the math portion of a national aptitude test. 
D) 53% of the senior class was accepted for admission to Valley State College in the fall. 
A) 30% of the senior class scored above average on the writing portion of a national aptitude test. 
B) 83% of the seniors who applied for admission to Valley State College were accepted. 
C) 25% of the senior class scored below average on the math portion of a national aptitude test. 
D) 53% of the senior class was accepted for admission to Valley State College in the fall.

Question 6

Solve the problem.
-A researcher finds a positive correlation between the amount of coffee people drink and
anxiety level. Can you conclude that drinking coffee causes anxiety? Propose other
explanations for the correlation. Suggest some ways that the researcher could go about
establishing causality. Refer to the six guidelines for establishing causality.

Accepted Answer

The correlation could be due to a common

Question 7

The graph below shows the approximate annual percentage growth rate in world population for the years 1960 through
2010. Data is estimated by the UN Census Bureau.
Annual Growth Rate (Percentage)   Use the graph to answer the question.
-In which year during the period 1960-2010 is estimated world population the greatest?

Accepted Answer

A) 1963 
B) 1970 
C) 2010 
D) 1960 
A) 1963 
B) 1970 
C) 2010 
D) 1960

Question 8

Create a graphical display for the data given. You may choose any graphic type that you feel is appropriate. Write a fewsentences explaining why you chose this type of display and a few sentences describing any interesting patterns in thedata.
-The table below shows statistics for AIDS. The first column shows the estimated number of
people living with HIV/AIDS worldwide in various years. The second column shows the
estimated number of new HIV infections worldwide in various years. $$\begin{array} { c | c | c } 
\text { Year } & \begin{array} { c } 
\text { Number Living } \
\text { with HIV/AIDS } \
\text { (Millions) }
\end{array} & \begin{array} { c } 
\text { New HIV Infections } \
\text { (Millions) }
\end{array} \
\hline 1997 & 30.6 & 5.8 \
1998 & 33.4 & 5.8 \
1999 & 33.6 & 5.6 \
2000 & 36.1 & 5.3 \
2001 & 40.0 & 5.0 \
2002 & 42.0 & 5.0
\end{array}$$

Accepted Answer

@#IMG-DLM& The multiple bar graph shows

Question 9

State whether you think that the variables have strong positive correlation, weak positive correlation, strong negativecorrelation, weak negative correlation, or no correlation.
-The age of a computer and its value.

Accepted Answer

A) Strong positive correlation 
B) No correlation 
C) Weak negative correlation 
D) Strong negative correlation 
E) Weak positive correlation 
A) Strong positive correlation 
B) No correlation 
C) Weak negative correlation 
D) Strong negative correlation 
E) Weak positive correlation

Question 10

Solve the problem.
-For the study described below, identify the population parameter. 1500 American women working for large companies were polled to determine the percentage that
Felt that women were under represented in management positions in their company.

Accepted Answer

A) The percentage of all American women who feel that women are under represented in management positions in large companies. 
B) All American women working for large companies 
C) The percentage of women in the sample who feel that women are under represented in management positions in their company. 
D) The percentage of American women working for large companies who feel that women are under represented in management positions in their company. 
A) The percentage of all American women who feel that women are under represented in management positions in large companies. 
B) All American women working for large companies 
C) The percentage of women in the sample who feel that women are under represented in management positions in their company. 
D) The percentage of American women working for large companies who feel that women are under represented in management positions in their company.

Question 11

State whether you think that the variables have strong positive correlation, weak positive correlation, strong negativecorrelation, weak negative correlation, or no correlation.
-Test score and height for adults

Accepted Answer

A) No correlation 
B) Weak positive correlation 
C) Weak negative correlation 
D) Strong negative correlation 
E) Strong positive correlation 
A) No correlation 
B) Weak positive correlation 
C) Weak negative correlation 
D) Strong negative correlation 
E) Strong positive correlation

Question 12

Answer the question.
-A poll is taken of likely voters the day before the mayoral election in the town of Ingleside. The poll reveals that 54% of voters plan to vote for Anne Sanchez. The margin of error is 3.9 percentage
Points. Which of the following statements best describes Anne Sanchez's chance of winning?

Accepted Answer

A) She is very likely to win 
B) She has a 54% chance of winning 
C) She is certain to win 
D) It is about 50-50 
A) She is very likely to win 
B) She has a 54% chance of winning 
C) She is certain to win 
D) It is about 50-50

Question 13

Construct the specified histogram.
-In a survey, 20 voters were asked their age. The results are summarized in the frequency
table below. Construct a histogram . $$\begin{array} { c | c } 
\text { Age } & \begin{array} { c } 
\text { Number of } \
\text { voters }
\end{array} \
\hline 20 - 29 & 5 \
30 - 39 & 5 \
40 - 49 & 6 \
50 - 59 & 0 \
60 - 69 & 4
\end{array}$$

Accepted Answer

The answer of  Construct the specified histogram.
-In a survey,...

Question 14

Identify the variable as either qualitative or quantitative.
-The heights of individuals in meters

Accepted Answer

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

Question 15

Use the indicated bin size to construct a frequency table for the set of data. Include columns for relative frequency andcumulative frequency.
-On a math test, the scores of 24 students were as follows: $\begin{array} { l l l l l l l l l l l l } 96 & 73 & 77 & 62 & 77 & 77 & 96 & 85 & 77 & 68 & 88 & 73 \end{array}$
$\begin{array} { l l l l l l l l l l l l } 73 & 88 & 77 & 73 & 88 & 77 & 73 & 85 & 73 & 88 & 85 & 62 \end{array}$ $\text { Use ten-point bins } ( 60 - 69,70 - 79 \text {, etc } )$

Accepted Answer

\[\begin{array} { l | c | l | c } 
\text

Question 16

Answer as requested.
-Which of the following is not a guideline for establishing causality?

Accepted Answer

A) Seek evidence that larger amounts of the cause produce larger amounts of the effect. 
B) Consider only the suspected cause, ignoring other potential causes. 
C) If possible, test the suspected cause with an experiment. 
D) Find a physical model that explains how the cause produces the effect. 
A) Seek evidence that larger amounts of the cause produce larger amounts of the effect. 
B) Consider only the suspected cause, ignoring other potential causes. 
C) If possible, test the suspected cause with an experiment. 
D) Find a physical model that explains how the cause produces the effect.

Question 17

State whether you think that the variables have strong positive correlation, weak positive correlation, strong negativecorrelation, weak negative correlation, or no correlation.
-Height and body temperature of adults.

Accepted Answer

A) Strong negative correlation 
B) Strong positive correlation 
C) Weak negative correlation 
D) No correlation 
E) Weak positive correlation 
A) Strong negative correlation 
B) Strong positive correlation 
C) Weak negative correlation 
D) No correlation 
E) Weak positive correlation

Question 18

Use the guidelines to evaluate the study. Discuss flaws that you see in the study.
-A researcher from an environmental group wishes to gauge political sentiment regarding
a proposed environmental law. He obtains a list of 1000 email addresses from an internet
provider, uses a random number table to select a random sample of 100 of these addresses,
emails the people in the sample asking them "How do you feel about the proposed
environmental law which will improve the quality of our air?" He requests that people
respond to his question by email.
After the study he announces that 72% of Americans are in favor of the new environmental
law.

Accepted Answer

There is selection bias as the sample wa

Question 19

Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?
-A researcher was interested in the exercise habits of the residents of the village of Pine Heights. She interviewed every 10th person who left the post office until she had interviewed 100 people. Each
Of the people interviewed was asked to rate their exercise level according to the following scheme
"(1)very little, (2)some, (3)moderate, (4)a lot, (5)extensive". The researcher reported that, on
Average, the residents of Pine Heights exercise moderately.

Accepted Answer

A) Participation bias 
B) Confounding variables 
C) Measurement of the variable is not well defined 
D) The source of the study 
E) Selection bias 
A) Participation bias 
B) Confounding variables 
C) Measurement of the variable is not well defined 
D) The source of the study 
E) Selection bias

Question 20

Create a graphical display for the data given. You may choose any graphic type that you feel is appropriate. Write a fewsentences explaining why you chose this type of display and a few sentences describing any interesting patterns in thedata.
-The table below shows the population by year for various countries. Population is given in
millions. $$\begin{array} { c | c | c | c } 
& \text { U.S. } & \text { Brazil } & \text { India } \
\hline 1950 & 152.3 & 53.4 & 369.9 \
1960 & 180.7 & 71.7 & 445.9 \
1970 & 205.1 & 95.7 & 555.0 \
1980 & 227.7 & 123.0 & 687.0 \
1990 & 250.1 & 151.1 & 841.7 \
2000 & 282.3 & 175.6 & 1002.7
\end{array}$$

Accepted Answer

@#IMG-DLM&
The multiple bar graph distin

Answer as requested. -Which of the following pairs of variables is likely to have a negative correlation?

Answer the question. -What name is given to a statistical graph where each category has its own wedge and the wedges are displayed on top of one another?

Describe how you would apply the five basic steps of a statistical study to the given issue. -You want to know the percentage of adults in the U.S. who have ever sought treatment from a practitioner of complementary medicine.

The graph below shows the approximate annual percentage growth rate in world population for the years 1960 through 2010. Data is estimated by the UN Census Bureau. Use the graph to answer the question. -In which year(s), if any, during the period 1960-2010 is world population constant?

Answer the question. -Which of the following study results implies that there is a problem with the quality of education at Rydell High?

State whether you think that the variables have strong positive correlation, weak positive correlation, strong negativecorrelation, weak negative correlation, or no correlation. -The age of a computer and its value.

Solve the problem. -For the study described below, identify the population parameter. 1500 American women working for large companies were polled to determine the percentage that Felt that women were under represented in management positions in their company.

State whether you think that the variables have strong positive correlation, weak positive correlation, strong negativecorrelation, weak negative correlation, or no correlation. -Test score and height for adults

Identify the variable as either qualitative or quantitative. -The heights of individuals in meters

Answer as requested. -Which of the following is not a guideline for establishing causality?

State whether you think that the variables have strong positive correlation, weak positive correlation, strong negativecorrelation, weak negative correlation, or no correlation. -Height and body temperature of adults.

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