Chapter-11
Introduction to Hypothesis Testing
Introduction - what is hypothesis testing? (11.1)
Four steps of hypothesis testing. (11.2)
Hypothesis tests for when population is normal
and population variance is known (11.2)
"Without data you're just an
Does a Higher Personal Income Lead to a Longer, Better Life?
A study on the effects of per capita GDP, Health Expenditure, Tertiary Education Attainment,
Poverty Rate, and Pollution Rate on overall life expectancy.
Brandon Gwinn
Hannah Secrist
Brandi Warn
ECN-423
Quiz- III (35 points)
Answer Key
This assignment has two parts: STATA assignment and the written assignment.
a) STATA assignment: Collect all the STATA output (whenever it is applicable) in one Microsoft
Word document. Label the questions for each
Chapter - 12
12.3: Inference about a Population
Proportion
Introduction
We are now going to shift our focus to population of nominal or
categorical data.
In this case, numbers are arbitrarily assigned to represent say:
a name
a brand
Therefore cannot be
Chapter-16- Part-II
Simple Linear Regression
I. Theoretical Model
Research question
Contains parameters
Burden of causation is upon the researcher
Example:
II) Collect a sample from the
population and look at the data
Get a general feel of the data
D
Chapter-17
Multiple Linear Regression
I. Theoretical Model
Research question
Contains parameters
Burden of causation is upon the researcher
Example: Y(salary) = 0 + 1X1(Education) + 2X2(GPA) +
3X3(Work Experience) +
Simple Linear Regression: Y(salary)
Multi-collinearity
Multiple Linear Regression
Multicollinearity
I.
II.
III.
IV.
The Nature of the Problem
Consequences
Diagnosis
Remedies
I. The Nature of the Problem
Y (Exam Score) = 0 + 1X1Student Performance + 2 X2Student Effort+
3X3Exam Content+
Prob
Basic Statistical Ideas
Chapter 8
13-1
Different Usage of Statistics
1) Descriptive Statistics
organizing, summarizing, and presenting
data in a convenient and informative way.
e.g. , 2
2) Inferential Statistics
draw conclusions or inferences about
cha
Chapter 16
Simple Linear Regression and
Correlation
Introduction
Q.) How does X (or Xs) affect Y?
A)
B)
C)
Examples:
1) What affects graduation rates in universities/colleges?
2)What are the factors that affect violent crimes (in terms of percentage of po
Chapter 12
Inference About a population
Inference about a population mean when the
standard deviation is unknown (12.1)
Student t distribution (8.4)
(Sections 12.1 & 8.4 are both covered in Exam-I)
12.3: Inference about a Population Proportion
(Post Exa
1
ECN- 423 Final EXAM Study Guide
Final Exam Date: December 9th (Tuesday) in class
Time: 4:00 p.m. 6:00 p.m.
Extended Office Hours: to be announced later
Exam Tips:
Make sure you go through the chapter handouts, the HW assignment & quiz very carefully al
1
ECN- 423 EXAM-II Study Guide
Exam-2 : Date: 11/13 (Thursday) in class
Content: Chapters 11.2, 12.3, 16, 17 & 18.1
Exam Tips:
Make sure you go through the chapter handouts, the HW assignment & quiz very carefully
along with their respective answer keys
1
ECN- 423 EXAM-I Study Guide
Exam-1 : Date: 10/02 (Thursday) in class
Content: Chapters 8, 9, 11, 12.1 (& 8.4)
Exam Tips:
Make sure you go through the chapter handouts, the HW assignment & quiz very carefully
along with their respective answer keys
Mak
Chapter-18
Nominal Independent Variables Application of Dummy
Variables
Interval Variables
Quantitative in nature.
Values can be measured numerically
We can calculate descriptive statistics for these variables, since
the values are not randomly assigne
ECN-423 Assignment- II (25 points) Answer key
Due Date: October 24th (Thursday) in class
Section 1 Multiple Choice Questions (1 point each). Choose the BEST response to each question.
Make sure to fill in the boxes provided below for Multiple Choice Answe
Chapter 9
Sampling Distributions
A sampling distribution is created by, as the
name suggests, sampling.
Case-I
Assume that the population average earnings of a Marshall University
graduate is $800/week (population mean is $800). What is the
probability th
Chapter 11.2
Introduction to Hypothesis
Testing : p-value method
Introduction
Example: Is the sample mean of $178
sufficiently greater than $170 to allow us to
confidently infer that the population mean
is greater than $170?
To answer this there are two a
Homework for Test 1 Material
Please answer the following and submit your answers by Blackboard on MUONline:
Chapter 2:
#1 a-i
#3 a-e
#4 a-c
Chapter 3:
#1 a-d
#4 a
Extra Problem
You do not need to turn this answer in. I will go over it on Review Day.
Think