ACE 210 Practice Midterm 1Fall 2010
Part I Multiple Choice
Choose the answer that is most correct. You do not need to provide any
explanations for your answers or show your work in this section. Clearly indicate
your answer. Ambiguities will receive zero

ACE 261 Fall 2010
Practice Midterm 3
Part I Multiple Choice
Choose the answer that is most correct. You do not need to provide any explanations for your
answers or show your work in this section.
1. In a chi-square analysis, the expected counts measure:
A

Short Answer Question 2
The other day I bought a bag containing a mixture of dark chocolate and milk chocolate
M&Ms. The pack contained 20 M&Ms. I decided to randomly select 4 of the
M&Ms without replacement and see whether they were dark or milk chocolat

Part I Multiple Choice
Choose the answer that is most correct. You do not need to provide any explanations for your
answers or show your work in this section. Clearly write each answer on a separate line in your
answer book. Ambiguities will receive zero

ACE 261
Lecture 3
August 31, 2010
Announcements
Correla8on vs. Causa8on
Explanatory variable a"empts to explain or is
purported to cause dierences in the
response variable.
Babies & heartbeats
Baldness & heart a

ACE 261
Sept 2, 2010 - Lecture 4
Announcements
Choose dataset
from the PDF called ACE 261 Group
Project Datasets.pdf on Aplia
infochimps.org/datasets
The rst rule of data
analysis:
ALWAYS GRAPH YOUR DATA
Which is easier to understand at a glance?
Males
90

ACE 261
Lecture 5
September 7, 2010
Announcements
First midterm is in 2 weeks
Email the names of your top 3 datasets to me
today
Look through the Group Projects Datasets
document that is posted on Aplia or

ACE 261
Lecture 7
September 14, 2010
Are national rates of infant mortality & economic
development related?
Do women earn less than men? What if they have
equal qualications?
In states with the death penalty, are African
Americans convicted of murder more

ACE 261
Lecture 8-September 16, 2010
Least-Squares
Regression
X = explanatory & Y = response
But correlation coefcient (r) doesnt
distinguish
We want to predict the response from a
certain value of the explanatory variable
Thats where regression comes

ACE 261
Lecture 9
Sept. 23, 2010
Chance Experiment & Sample Space
A chance experiment is any ac?vity or situa?on
in which there is uncertainty about which of
two or more possible outcomes will result.
The colle

ACE 261
Lecture 11
Sept 30, 2010
Announcements
Random Variables
A numerical variable whose value depends on the
outcome of a chance experiment is called a
random variable. A random variable associates a
numerical value with each outcome of a chance
exper

ACE 261
Lecture 13
October 7, 2010
Announcements
Homework for chapter 7 due next Tuesday
at noon
The Geometric
Suppose an experiment consists of a sequence of trials
with the following conditions:
1. The trials are independent.
2. Each trial can result i

ACE 261
Lecture 14
October 12, 2010
Sampling Distribution
Describes how sample results behave if
we draw repeated samples of a particular
size n from a larger population
Typically we only draw one sample, but
well use the statistical properties of the
s

Chapter 9
Estimation
Using a Single Sample
The ideas in hypothesis testing are based on
deductive reasoning - we assume that some
probability model is true and then ask What
are the chances that these observations
came from that probability model?.
Point

ACE 261
Lecture 18
November 2, 2010
Phase III
Compare Means
Regression Analysis
Simple regression
Test your hypotheses
Correctly state the null & alternative
Report p-value & confidence intervals for slopes
R2
Multiple regression
Construct & test