-Population: Complete set of people or objects of interest (all adults in county)
-Sample: Subset of population for which data can be obtained in a study (2000 adults polled)
-Parameter: a fixed (but usually unknown) number summarizing some feature of a p
36-202 Homework 8 solutions
PROBLEM 1: 62 points 1(a) 6 points The explanatory variables are Age, Gender, Race, and Political affiliation. The response variable is the mayoral candidate they plan to vote for. 1(b) 4 points We need to convert the categoric
36-202 Lecture 4 (1/25/05) Last time. The "Big Ideas" of Statistical Inference Inference: Using the information that was obtained in the sample in order to draw conclusions about the population (parameters). There are three main components to statistics i
The "Big Ideas" of inference - Lecture 3 (1/23/06)
Inference: Using the information that was obtained in the sample in order to draw conclusions about the population (parameters). There three main components to statistics inference: 1. Points estimation -
Simple (Linear) Regression
Relationship Between Two Quantitative Variables
Here is the "Big Picture":
SRS of size n
Population of interest
Question: Are the two quantitative variables X and Y related?
DATA
summarized by a scatterplot and r (if relevant)
I
STAT 36-202 - Lecture 1
Example 1: Suppose we are interested in modeling the crime rate in a county based on factors such as income, education, and urbanization. Data was collected from all 67 counties of the state of Florida. The response variable is the
36-202 Homework 6 Solutions
PROBLEM 1: 33 points
1(a). 6 points (1 for table of means, 1 for interaction plot, 4 for summary)
The table of means and the interaction plot indicate that there is an interaction between Study
and Test. The group that both stu
36-202 Homework 5
Spring 2006
This homework is due Wednesday, March 8, in class BEFORE class starts . No HW will be accepted once the assignments have been collected. Please type your solutions, and paste Minitab output into your document in the relevant
36-202 Homework 4
Spring 2006
This homework is due Wednesday, February 22, in class BEFORE class starts . No HW will be accepted once the assignments have been collected. Please type your solutions, and paste Minitab output into your document in the relev
36-202 Homework 1
Spring 2005
This homework is due Wednesday, February 1, in class BEFORE class starts . HW submitted
after HW has been collected and before 4:00 will be accepted, but panelized 20 points. No HW will
be accepted after 4:00.
Please type yo
36-202 Homework 5 Solutions
QUESTION 1, LAB6: 48 points
1.1 2 points (1 for observational study, 1 for explanation)
This is an observational study, because no treatment was imposed on the respondents.
(Note: The fact that everyone takes the test does not
36-202 Homework 8 - Logistic Regression
This homework is due Monday, May 1, in class BEFORE class starts . No HW will be accepted once the assignments have been collected. Please type your solutions, and paste Minitab output into your document in the rele
36-202 Homework 7 - Logistic Regression
Spring 2006
This homework is due Wednesday, April 19, in class BEFORE class starts . No HW will be accepted once the assignments have been collected. Please type your solutions, and paste Minitab output into your do
36-202 Homework 7 solutions
PROBLEM 1: 5 points (3 for work, 2 for answer) p = .08, so the odds are
p 1p
=
.08 .92
=
8 92
=
2 23
The odds of a male being color blind are 2 to 23. PROBLEM 2: 5 points (3 for work, 2 for answer) = 18 2 2p = 18(1-p) 2p + 18p
36-202 Homework 3 Solutions
PROBLEM 1: 30 points
1a. 2 points
The scatterplot of miles per gallon versus speed shows a nonlinear relationship between the two
variables, so simple linear regression isnt appropriate.
ScatterplotofmpgvsSpeed
40
mpg
35
30
25
Simple (Linear) Regression
36-202 1/30 Lecture 6
Last time. The "Big Picture":
Population of interest
Question: Are the two quantitative variables X and Y related?
SRS of size n
DATA
summarized by a scatterplot and r (if relevant)
Inference
Is the evidenc
36-202 Exam sheet
Simple Binary Logistic Regression
-2 parameters: *B1=most important coefficient (if B1=0, X would not help predict
probabilities, p=constant)
Log odds
(for predicting X from puse ln)
Odds
(for interpreting the coefficients)
x=0 when Y=1
Lecture 4 36-202
Wed, Jan. 20 Spring 2016
Beginning Simple Linear Regression (SLR):
Modeling the Relationship Between 2 Quantitative Variables
[Reserve Material References:
Chapter 12 of Statistics By Agresti and Franklin;
Chapter 10 of Introduction to th
Homework 4
36-202 Spring 2016
Due: Wednesday, Feb 10, at the beginning of lecture.
Instructions:
1. Write up your solutions on separate paper, with your name on all pages.
2. The work and words that you submit must be your own.
Print out the homework 4 co
Homework 3
36-202 Spring 2016
Due: Wednesday, Feb 3, at the beginning of lecture.
Instructions:
1. Write up your solutions on separate paper, with your name on all pages.
2. The work and words that you submit must be your own.
Print out the homework 3 cov
Homework 2
36-202 Spring 2016
Due: Wednesday, January 27, at the beginning of lecture.
Instructions:
1. Write up your solutions on separate paper, with your name on all pages.
2. The work and words that you submit must be your own.
Print out the homework
Homework 1
36-202 Spring 2016
Due: Wednesday, January 20, at the beginning of lecture.
Instructions:
1. Write up your solutions on separate paper, with your name on all pages.
2. The work and words that you submit must be your own.
Print out the homework
Handout for Lecture 8 (2/3/06) So far. The Simple Linear Regression Model: y i = 0 + 1 xi + i The deviations, i are assumed to be: independent have mean 0 constant standard deviation (for all values of x) normally distributed
Now.
What if Things Go "Wrong
36-202 - STATISTICAL METHODS
LAB #3
Spring, 2006
Transformations, Higher-Order Models and Introduction to Multiple Regression
Your Name:
Partners Name:
Section:
Instructions:
The TAs are available to help you if you have any questions about this lab exer
36-202 Homework 6
Spring 2006
This homework is due Wednesday, March 29, in class BEFORE class starts . No HW will be accepted once the assignments have been collected. Please type your solutions, and paste Minitab output into your document in the relevant