Chapter l9 Multiple Regression
5. if you are performing an analysis with a single response and several potential ex
planatmy variables, how would you decide which variables to inClude in a mu:
. . , 1~
ple regression model and winch to leave out?
6. How
Statistics 305 Final Exam
You are allowed calculators and either (i) two 8.5><11 inch formula sheets that include
your statistical tables, or (ii) one 8.5x 11 inch formula sheet without statistical tables. Please
write your answers in an exam booklet. You
Stat 305 Midterm 1  PRACTICE MIDTERM
Wednesday, October 12, 2016
Student Name _
Student Number _
You have exactly 50 minutes to complete this exam.
This test has 5 pages including this one, and tables.
Only calculators are allowed for electronics.
That m
Assignment 4
P.100
#2
A deductively strong argument must have two conditions: valid argument and reasonable
for the person to believe its premises. All premises are reasonable for the person not
everyone think its reasonable to believe. Valid argument doe
Five lectures hours (+2 recorded) remain.
Left to do:
 Logistic regression with multiple predictors (bird houses!)
 Survival analysis
KaplanMeier method
Coxpoportion hazard test
Logrank test
(if time) Timecensoring
 Practice final
Stat 305 Notes. W
Week 3 Supplemental: The Odds.
.Never tell me them
Stat 305 Notes. Week 3 Supplemental Page 1 / 23
Odds
Odds are a lot like probability, but are calculated differently.
Times event occurs
Probability of event =
Times anything occurs
Stat 305 Notes. Week
Stat 305 PRACTICE Midterm 2
PRACTICE Problem 1: Consider the following regression output, which comes from data of
100 local chess players of near average skill.
Chess_Skill: The skill of the the player, in Elo rating.
Games_Played: The number of register
Stat 305 Midterm 2
Wednesday, November 16, 2016
Student Name _
Student Number _
You have exactly 50 minutes to complete this exam.
This test has 7 pages including this one, and a table.
Only calculators are allowed for electronics. That means no digital t
Stat 305 Midterm 1  PRACTICE MIDTERM
Wednesday, October 12, 2016
Student Name _
Student Number _
You have exactly 50 minutes to complete this exam.
This test has 6 pages including this one, and tables.
Only calculators are allowed for electronics.
That m
Stat 305, Fall 2016 Assignment 3 KEY
Question 19.6, as is.
See scanned notes.
Question 19.7,
See scanned notes.
Question 19.8.
19.8a, 19.8g
19.8b
Holding apgar score constant, the systolic blood pressure of infants increases by 1.1848 for
each additional
Stat 305, Fall 2016 Assignment 3,
Due in the drop box near the Stats Workshop at 4:30pm on December 5, 2016.
Or at K10561 (upstairs from stat workshop) by 7pm December 9, 2016
! SEE THE R CODE AT THE END OF THIS ASSIGNMENT !
All of these questions either
Final exam list of priorities
Midterm 1 (20%)

probability: A or B, A and B, Bayes Law
Sensitivity vs specificity, ROC curve
Midterm 2 (40%)

Regression
o Correlation
o Simple regression
transformation
o Multiple regression
Interactions, polynomials,
Stat 305 Week 8, Monday. October 24, 2016
(Pearson) Correlation and regression.
Hypothesis testing for correlation and regression
 Installing R and inputting data.
 Different tools for R: Notepad+ and RStudio.
 Basic commands: ?, ?, mean(), sd(), t.tes
Statistics 305: Introduction to Biostatistical Methods
for Health Sciences
Review of Introductory Statistics Basic Probability
Instructor: Liangliang Wang
Statistics and Actuarial Science, Simon Fraser University
Fall 2015
Liangliang Wang (SFU)
Statistics
STAT 305 Assignment 4 Solution
Due: Nov 18, 16:30, 2015
Note: There are totally 2 big questions. No more update.
Updated on Nov 11, 2015.
1. (2 marks) Short answers:
(a) (1 mark) Briey, what does a positive association between two quantitative
variables m
Stat 305 Week 9 Monday
Multiple regression and rsquared.
Multiple regression: colinearity, perturbations,
correlation matrix
Stat 302 Notes. Week 7, Hour 1, Page 1 / 59
First observe this data from the 201112 National Hockey
League season.
We are going
Stat 305 Week 9 Wednesday
How to get a confidence interval of a slope.
Variance inflation factors
Polynomial fits
Stat 305 Notes. Week 9 Wednesday, Page 1 / 43
How to get a confidence interval of a slope.
Consider this output again, from the blood pressur
Stat 305 Week 7, Hour 1. October 18, 2016
Correlation vs association,
Pearsons R,
nonlinearity,
Spearman rank correlation,
Stat 305 Notes. Week 7, Hour 1, Page 1 / 39
Correlation vs association
Association refers to any sort of trend between between any
With linear we regression, we make the assumption that Y
increases or decreases with X, but does so at the same rate
for every X.
Stat 302 Notes. Week 7, Hour 3, Page 1 / 13
This is not always the case. Sometimes a transformation, like
the log transform c
Statistics 305: Introduction to Biostatistical Methods
for Health Sciences
Applications of Conditional Probability
Instructor: Liangliang Wang
Statistics and Actuarial Science, Simon Fraser University
Fall 2015
Liangliang Wang (SFU)
Statistics 305
Fall 20
Statistics 305: Introduction to Biostatistical Methods
for Health Sciences
Review of Introductory Statistics Sampling Distributions, Condence
Intervals, and Hypothesis Testing
Instructor: Liangliang Wang
Statistics and Actuarial Science, Simon Fraser Univ
Statistics 305: Introduction to Biostatistical Methods
for Health Sciences
Review of Introductory Statistics Sampling Distributions, Condence
Intervals, and Hypothesis Testing
Instructor: Liangliang Wang
Statistics and Actuarial Science, Simon Fraser Univ
Statistics 305: Introduction to Biostatistical Methods
for Health Sciences
Applications of Conditional Probability
Instructor: Liangliang Wang
Statistics and Actuarial Science, Simon Fraser University
Fall 2015
Liangliang Wang (SFU)
Statistics 305
Fall 20
Statistics 305: Introduction to Biostatistical Methods
for Health Sciences
Review of Introductory Statistics Basic Probability
Instructor: Liangliang Wang
Statistics and Actuarial Science, Simon Fraser University
Fall 2015
Liangliang Wang (SFU)
Statistics
Statistics 305: Introduction to Biostatistical Methods
for Health Sciences
Review of Introductory Statistics Data Presentation and Summaries
Instructor: Liangliang Wang
Statistics and Actuarial Science, Simon Fraser University
Fall 2015
Liangliang Wang (S
STAT 305 Assignment 3 Solution
1. (Ch. 15, # 10; 4 marks)
In a survey conducted in Italy, physicians with dierent specialities were questioned regarding the surgical treatment of early breast cancer. In particular,
they were asked whether they would recom
STAT 305 Assignment 2 Solution
To TAs: Its OK if students have slightly dierent results because of dierent
rounding.
1. (9 marks) A study was conducted to investigate the relationship between
maternal smoking during pregnancy and the presence of congenita
Stat 305, Fall 2016 Assignment 3,
Due in the drop box near the Stats Workshop at 4:30pm on December 5, 2016.
Or at K10561 (upstairs from stat workshop) by 7pm December 9, 2016
! SEE THE R CODE AT THE END OF THIS ASSIGNMENT !
All of these questions either
Stat 305 Practice Final
Problem 1
Consider the multiple linear regression outlined in this R output.
The response is birth weight in grams (BWT), the explanatory variables are age in years
(AGE), smoking status (SMOKE, 2 categories), weight in pounds of t