Chapter 12
Chi-Square Tests
Outline
1)
2)
)
)
)
Chi-square test for independence on a contingency
table.
Goodness-of-fit (GOF) test for any specified
distribution.
GOF test for a finite discrete distribution.
GOF test for a discrete uniform distribution.

CHAPTER 10 Making Capital Investment Decisions
Answers to Concepts Review and Critical Thinking Questions 1. An opportunity cost is the most valuable alternative that is foregone if a particular project is undertaken. The relevant opportunity cost is what

Chapter 11
Analysis of Variance
(ANOVA)
Introduction
In the previous chapter, we learned how to test the means of two
populations by taking samples within each population.
In this chapter, we will learn how to test more than two means
simultaneously and h

1
Comm 207
Simple Hypothesis Tests and Errors
-Recall our definition of a hypothesis:
-Theory, claim, assertion
-Statement about a particular parameter of a
population
-Why do we perform hypothesis testing?
1. It forms part of the statistical problem-solv

1. Question 8.38 (Textbook, page 291)
- Intuitively explain why a value of s21 / s22 that is substantially greater than 1 provides evidence that 21 is
not equal to 22?
- The larger the difference is between s21 & s22 the more likely we are to Reject the n

' ' COMM207 Businessstatistics II . Midterm Exam -' .- 'Fau'20'13
Part 1 Multiple Choice . ,
Ileas'e enter your answers for questions 1 through 15' in the opscan sheet provided.
1. If the p value 1s less than a in a two~tailed test,
A. No conclusion shoul

Student name: _.
Student number;
University of Saskatchewan
College of Commerce
Department Of Finance and Management Science
Comm. 207(06)
Midterm Examination #2
Open-Book Exam
Professor: Nancy Lee Date: April 4, 2011
Maximum Marks: 100 Time: 90 Minutes
.

COMM207 Business Statistics II Midterm Exam Fall 2013
FE; EDWARDS
V SCHOOL or BUSINESS
'lJNIVKRRl-TY 0F SRQEG'CIIEWAN
Midterm Exam-Set A
October 21, 2013
Name (last, rst):_ Student N umber:_ _
Marks Received:
Part LM/C cfw_SC/15
Part II, Problems 6

1
Comm 207
Population mean tests
Equal
H0: = 0
Ha:
Upper
H0:
Ha: >
0
0
0
Lower
H0: 0
Ha:
0
-Recall our Hypothesis testing procedure
1. State your hypotheses
2. Identify the test statistics
3. State the decision rule
4. Calculate the critical value
5.

1
COMM 207
Hypothesis tests
Much of the sampling distributions material was
covered in the Statistics Review
Statistical thinking will one day be as necessary for
efficient citizenship as the ability to read and write
H.G. Wells (1866-1946)
Common statist

1
Comm 207
Two sample tests for variance
Earlier, we looked at hypothesis testing for drawing conclusions about whether a population variance had
been reduced
We now explore the case for deciding, based on two samples, whether the variances from the two
p

1
COMM 207 (04): Statistics II
N. Murray Edwards School of Business, University of Saskatchewan
Term 2, 2015-2016
Assignment #2 Solution Key
Instructor: Keith A. Willoughby
Due Date: Tuesday, February 2nd, 2016
Out of 50 points
5 points for each written r

Case Study Accounting Start up Points
1) Shirts are received and stored in a warehouse
2) In the spring, designs are imprinted on the shirts and are sold to retail clothing stores.
3) At the end of summer any shirt that was not sold in the store, GAC refu

1
Comm 207
Two sample tests for means
In the previous material, we focused on drawing conclusions about a population by taking a single
sample of data
We now investigate tests that evaluate two samples of data from populations
Example 1: Employee Absentee

1
Comm 207
Goodness of Fit tests
Goodness of fit refers to how well some sample data fit a particular probability distribution
-Normal (bell-shaped)
-Uniform (straight line)
-Poisson
-Triangular
-Exponential
These tests are very useful in a number of area

1
Comm 207
Contingency table tests
Valuable approach for comparing counts of categorical responses
-What would be an example of categorical responses?
- Attribute (male/female, rent/own, rural/urban)
Extensive use in marketing and demographic analysis
Con

1
Comm 207
Population proportion tests
*Population proportion tests will use a Z distribution.
-What is a proportion?
- Count of # of occurrences and divide it by the number of observations
Example 1: Environment Canadas Air Quality Standards
Environment

1
Comm 207
Population variance test
-What is variance?
- Measures how far each number in the set is from the mean
- Measures dispersion
-Why would it be important to evaluate variances?
- Substantial variance could lead to outliers. Skewed data
Example 1:

1
Comm 207
Two sample tests for proportions
Just like we did for evaluating the difference between two sample means, we can use our hypothesis
testing procedure to evaluate the difference between two sample proportions
Example 1: Id like to propose a toas

Toillustratetheunequalvariancesprocedure,considerthebankcustomerwaitingtimesituationand
recallthat12isthedifferencebetweenthemeancustomerwaitingtimeunderthecurrentsystemand
themeancustomerwaitingtimeunderthenewsystem.Becauseofcostconsiderations,thebank
ma

University of Saskatchewan
Edwards School of Business
Department of Finance & Management Science
Business Statistics II (COMM 207), Section 03, Fall 2012
Midterm Exam Date: October 16th, 2012

Chapter 11
Analysis of Variance
(ANOVA)
Outline
1)
2)
3)
One-Factor ANOVA Model
Two-Factor ANOVA Model Without Replication
Two-Factor ANOVA Model With Replication
Two-Factor ANOVA Modelmatrix entry.
With
Imagine having a block of m observations in each
Re

Chapter 14
Multiple Regression
More than one
Independent Variable/Predictor
The response variable (Y) is a random variable that is assumed to
be related to the k predictors (X1, X2, , Xk) by a linear equation
called the population regression model:
Exampl

Assignment #1
COMM207
Due: Wednesday, October 16th, 2013 (at the beginning of the class)
Instructions: Solve the following questions from the textbook. You may
use Excel to do the calculations for mean or the standard deviation but not
for performing the

Sample Questions on Chapter 16-Nonparametric Tests
Question #1: The following dataset is given on the weight of 3 and 3.5 year old children
(in kg). Test at the level of significance of 10% if there is any significant difference
(based on medians) between

Assignment #2
COMM207
Due: Monday, November 25th, 2013 (at the beginning of the class)
Instructions: Solve the following questions from the textbook. You may
use Excel to do the intermediate calculations.
Chapter 12
12.10, 12.16
Chapter 13
Use the data se

Solution 6
Question 1: 10=6+4
1
Rennie, Inc.
Variable Costing Income Statement
For the Year Ended December 31, 2012.
Sales
Less Variable expenses:
Variable cost of goods sold (8,000 x $11.50)
Variable selling and admin (8,000 x $3.50)
Contribution margin

COMM 207.1
Business Statistics II
Course Outline
Fall 2013
The Edwards School of Business develops business professionals to build nations.
Instructor
Telephone
Office
Email
Office Hours
Lecture Time
Mahshid Atapour
306-966-1174
Room ESB 82.1
atapour@math

Greater-Than: Trash-Bag
A leading manufacturer of trash bags produces the strongest trash bags on the market. The company has developed a new 100-litre bag using a specially formulated
plastic that is stronger and more biodegradable than other plastics. T