B01.1305
FINAL EXAM
This is the question sheet. There are 10 questions, each worth 10 points. Please write all
answers in the answer book, and justify your answers. Good Luck!
In questions 1-6, we consider data on home prices in the U.S. The data are annu

COR1-GB.1305
SAMPLE MIDTERM
Name:_
This is the answer sheet. Circle the choice which best answers each question on
the exam. Do not write anything else on this sheet (besides your name and the
circles). When you are finished, hand in just this answer shee

Populations, samples, surveys and statistical inference
The essence of statistics is inference taking available information, and inferring
properties of the objects that we did not see. This is fundamentally connected to the ideas
of populations and sampl

Minitab 17 commands
Data entry and manipulation
To enter data by hand, click on the Worksheet window, and enter the values in as
you would in any spreadsheet. To then save the data as Minitab le, click on the Session
window, and then click on the diskette

Data presentation and summary
Consider the following table:
State
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Washington, D.C.
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Income
18,010
23,788
19,001
16,898
22,493

Many postseason matchups in North American professional sports are best-of-7 series, with the rst
team to four wins winning the series. Consider a series between two evenly-matched teams, and assume
that the outcome of any game is independent of the
outco

Homework 2
1. According to research performed at Stony Brook University, more than ten years after
the events of September 11, 2001, World Trade Center responders continue to experience both physical and mental illnesses, a comorbidity that is a signature

Does bicycle legislation and safety information have
any relation to helmet usage among children? M.L.
Macknin and S.V. Medendorp investigated this question in their paper Association between bicycle helmet legislation, bicycle safety education, and use o

Homework 1
1. An article under the headline 26 Million Homeless, Survey Says in the December
28, 1994, issue of the Columbus Dispatch reported that 13.5 million Americans have
been homeless for at least a few days sometime during their lives, based on a s

Extra data analysis problems
CHS Casebook:
(1) \Predicting the sales and airplay of popular music" (p. 23)
Follow the guidelines given in the case, but do not use the rock.mtp data set
from the chs directory. Use instead the data set rock2.mtp from the js

Answers
Predicting the sales and airplay of popular music
The plot of sales versus airplay indicates a modest positive relationship, although the variation is quite
large. The plots for sales last week versus airplay this week and sales last week versus a

Probability the language of randomness
The eld of statistics is concerned with decision making under uncertainty. We observe
a random process (generically, an experiment), where multiple results (outcomes or events)
are possible.
(a) Flip a coin heads or

Predicting the sales and airplay of popuiar music
Topics covered: Data summary. Examination of univariate data. Prediction.
Key words: Scatter plot.
Data File: r o c k . dat
Each week the music industry magazine Billboard publishes lists of the most
popul

COR1-GB.1305
SAMPLE FINAL EXAM
This is the question sheet. There are 10 questions, each worth 10 points. Please write all
answers in the answer book, and justify your answers. Good Luck!
1) The following table presents data collected in the 1960s for 21 c

SOLUTIONS TO MIDTERM
VERSION 2
1)
Let A=cfw_Greece Defaults, B=cfw_Italy Defaults
Then P(B|A) = .2 = P(A B) / P(A).
We also know that P(A) = 2P(B).
So P(B|A) = .2 = P(AB)/[2P(B)], that is,
.4 = P(A B)/P(B).
We want P(A|B) = P(A B) / P(B) = .4. Answer is C

COR1-GB.1305.03
MIDTERM
Name:_
This is the answer sheet. Circle the choice which best answers each question on
the exam. Do not write anything else on this sheet (besides your name and the
circles). When you are finished, hand in just this answer sheet. Y

SOLUTIONS TO FINAL EXAM
VERSION 1
1)
A) As Mortgage Rate increases, Home Price seems to decrease, on average, although
there is some curvature in the plot.
B) One could argue that lower Mortgage Rates provide an incentive to buy homes,
which in turn could

B01.1305
FINAL EXAM
This is the question sheet. There are 10 questions, each worth 10 points. Please write all
answers in the answer book, and justify your answers. Good Luck!
In questions 1-6, we consider data on home prices in the U.S. The data are annu

SOLUTIONS TO FINAL EXAM
VERSION 2
1)
A) As Mortgage Rate increases, Home Price seems to decrease, on average, although
there is some curvature in the plot.
B) One could argue that lower Mortgage Rates provide an incentive to buy homes,
which in turn could

COR1-GB.1305.03
FINAL EXAM
This is the question sheet. There are 10 questions, each worth 10 points. Please write all
answers in the answer book, and justify your answers. Good Luck!
In questions 1-6, we consider a data set on 14 brands of U.S. domestic c

SOLUTIONS TO FINAL EXAM
VERSION 1
1)
A) No, since the Minitab p-value for the intercept is not less than .01. This p-value
corresponds to a two-tailed alternative hypothesis, which is what we want here.
We do not divide Minitabs p-value by 2, since we do

COR1-GB.1305.03
FINAL EXAM
This is the question sheet. There are 10 questions, each worth 10 points. Please write all
answers in the answer book, and justify your answers. Good Luck!
In questions 1-6, we consider a data set on 14 brands of U.S. domestic c

SOLUTIONS TO FINAL EXAM
VERSION 2
1)
A) No, since the Minitab p-value for the intercept is not less than .01. This p-value
corresponds to a two-tailed alternative hypothesis, which is what we want here.
We do not divide Minitabs p-value by 2, since we do

B01.1305.03
MIDTERM
Name:_
This is the answer sheet. Circle the choice which best answers each question on
the exam. Do not write anything else on this sheet (besides your name and the
circles). When you are finished, hand in just this answer sheet. You c

SOLUTIONS TO MIDTERM
VERSION 1
1)
By the general addition rule, P(A B)=P(A)+P(B) P(A B). Since A, B are
independent, we have P(A B)=P(A)P(B). Thus, P(AB)= .2 + .3 (.2)(.3)
= .44. Answer is C.
2)
The statement is false, since P(AB) =0, but we could have P(

B01.1305.03
MIDTERM
Name:_
This is the answer sheet. Circle the choice which best answers each question on
the exam. Do not write anything else on this sheet (besides your name and the
circles). When you are finished, hand in just this answer sheet. You c

SOLUTIONS TO MIDTERM
VERSION 2
1)
By the general addition rule, P(A B)=P(A)+P(B) P(A B). Since A, B are
independent, we have P(A B)=P(A)P(B). Thus, P(AB)= .2 + .3 (.2)(.3)
= .44. Answer is C.
2)
The statement is false, since P(AB) =0, but we could have P(

COR1-GB.1305.03
MIDTERM
Name:_
This is the answer sheet. Circle the choice which best answers each question on
the exam. Do not write anything else on this sheet (besides your name and the
circles). When you are finished, hand in just this answer sheet. Y

SOLUTIONS TO MIDTERM
VERSION 1
1)
Let A=cfw_Greece Defaults, B=cfw_Italy Defaults
Then P(B|A) = .4 = P(A B) / P(A).
We also know that P(A) = 2P(B).
So P(B|A) = .4 = P(AB)/[2P(B)], that is,
.8 = P(A B)/P(B).
We want P(A|B) = P(A B) / P(B) = .8. Answer is B