Answer Key for Exam A
1. Answer: Observational study: no randomization
2. Answer: The odds ratio is a ratio of the odds that an event occurs in one set of
conditions to the odds that the event occurs in a dierent set of conditions. For
example, a odds rat
Stat 1001 Winter 1998 Geyer
Homework 1 Problem 2.3
No, they were wrong. No valid conclusion can be drawn from these numbers. The whole point of the randomized controlled experiment is that the consent" group treatment plus control and the no consent" grou
Stat 1001 Winter 1998 Geyer
Homework 3 Problem 6.1 Problem 6.3
a b
False. This was widely believed into the 1700's. The main point of this chapter is that there is always measurement error, even under the best of circumstances. Some of this is always chan
Stat 1001 Winter 1998 Geyer
Homework 7 Problem 18.1
20 and 25.
Problem 18.2
a Average of the box. 1 + 3 + 5 + 7 4 = 4.
=
SD of the box. The deviations from the average are ,3, ,1, 1, 3. The squared deviations are 9, 1, 1, 9. The sum of the squared deviati
Stat 1001 Winter 1998 Geyer
Homework 10 Problem 27-1
Despite this being in Chapter 27, it is clearly a problem about one box model. It uses the methods of Chapter 26. show positive numbers. This is a classifying and counting problem" counting tickets show
Fun Thanksgiving Statistics
46.5 million the Expected Number of turkeys Minnesota is
expected to have raised in 2011. Minnesota is the leading state
for turkey production.
430 million the number of pounds of cranberries produced in
Wisconsin in 2011
37
Conclude for 1-4 Chapters
It is important for us to know the 7 components? They could help us to
determine the soundness of statistical studies.
Component 1: Who pay for it?
The answer should focus on: theme, who conduct it? Who pay for the
money? Is bias
Probability
Different Types:
Relative Frequency (p. 298) the proportion of
time an event occurs over the long run
Physical Model the proportion of times an event
occurs in a sample
E.g. - 2 out of 500,000 scratch off lottery tickets that
were printed
Name:
University of Minnesota
Stat 1001S. Weisberg
Sample Final Examination
Here is a modied article abstract for you to read.
Mothers Spanking of 3-Year-Old Children and Subsequent Risk of Childrens
Aggressive Behavior
The goal of this study was to exami
Course Activity:
Monday Breakups & Racial Disparities in Police
Stops
See the Activity 2 handout for general instructions. Answer the questions in this
assignment in the order they are presented. We recommend you type your
answers into a saved, word-proce