REGRESSION ANALYSIS
* Well you have made it to the final chapter of the course (yay!)
*In this chapter I will briefly introduce you to a commonly used technique of statistics,
Regression Analysis.
* Regression analysis allows one to make predictions.
For
More Hypothesis Testing:
* In Chapter 9 we learned how to test one population mean.
* In Chapter 10, we learned how to test two population means.
* In reality, there are many additional types of hypothesis tests available, depending on
the population para
In this report, we will be testing to determine whether regular exercise lowers ones cholesterol level. To
test this, we surveyed 300 employees at an organization that is given access to an exercise facility. We
confirmed their cholesterol level in additi
Serge A. Storm
123456789
January 4, 2017
Education Funding
University budgets are under pressure from both rising costs and lower government spending. One
way to deal with the budget pinch is to cut expensive programs such as the lab courses: physics, che
Writing up your findings
Before you do any work on the problem, get straight in your mind exactly what you are being asked to
do. You need to be clear and so does the decision-maker to whom you are going to submit your findings.
Here is one way to do this
ANOVA HOMEWORK BUQU3230
Some companies are becoming concerned about the cholesterol levels of their employees. The big boss
has installed an exercise facility and he encourages staff to use this facility. He asks you to test whether
the new facility is in
Chapter 5 Discrete Probability Distributions
*This file might seem very large but it is because I have included many screenshots
and drawings. But we really are only covering three sections of the text ( 5.4, 5.5 and
6.2).
* In the next two chapters, we w
Chapter 3: Descriptive Stats
Chapter Overview: This chapter about descriptive summary measures has four
parts:
Part 1: Measures of Central Tendency
Part 2: Quartiles and Percentiles
Part 3: Measures of Variability
Part 4: Determining Outliers
Part 5: Corr
Draft Notes: CHAPTER 4 - PROBABILITY
* We are now entering the wonderful world of probability.
* You probably (no pun intended ) are wondering why I refer to probability as
wonderful . The reason is that probability and its associated concepts govern much
Chapter 2- ONLINE PRACTICE:
A. Open the StatsStudents data file.
1. Create a frequency distribution table of the Variable: Final Course Grade.
Use 9 class intervals and include information for frequency and percentage.
* Sort data
* Determine width of int
SOLUTIONS TO PRACTICE-
Chapter 4:
*You are interested to know how many people file their taxes on time. Therefore you conduct a survey of 100 residents in
Langley who file their own taxes and divide their responses by gender (male, female) and by whether
Answers- Chapter 1:
1. The datafile taxreturn contains information about the tax return habits of 93
individuals. The variables investigated were whether the individual files
their own tax return (yes/no), if they file, whether they do so by hand or with
A
B
C
D
Restaurant Quality Rating Gender Meal Price ($)
1
Good
Male
18
3
2
Very Good Male
22
4
3
Good
Female
28
5
4
Excellent Male
38
6
5
Very Good Female
33
7
6
Good
Male
28
8
7
Very Good Male
19
9
8
Very Good Female
11
10
9
Very Good Female
23
11
10
Goo
HYPOTHESIS TESTING
*Now we will start a series of chapters about Hypothesis Testing.
*The current chapter is *extremely* important because it provides logic and the basis
for the methods used in the subsequent chapters.
*At first, many students find this
Chapter 3: Descriptive Stats
Chapter Overview: This chapter about descriptive summary measures has four
parts:
Part 1: Measures of Central Tendency
Part 2: Quartiles and Percentiles
Part 3: Measures of Variability
Part 4: Determining Outliers
Part 5: Corr
Chapter 5 Discrete Probability Distributions
*This file might seem very large but it is because I have included many screenshots
and drawings. But we really are only covering three sections of the text ( 5.4, 5.5 and
6.2).
* In the next two chapters, we w
Chapter 10- Hypothesis Testing: 2 Population Means (,)
* In the last chapter, we learned how to test a hypothesis with one population mean.
* In this chapter, we will learn how to test hypothesis with two population means.
* Which test to use depends on t
CHAPTER 2- GRAPHS AND TABLES
Overview:
* In this chapter we will learn how to summarize, organize and present data
by using graphs and tables.
*Part 1: Graphs we wont be focusing on making graphs. Rather we will
focus on i) the properties that good graphs
CHAPTER 4 - PROBABILITY
* We are now entering the wonderful world of probability.
* You probably (no pun intended ) are wondering why I refer to probability as
wonderful . The reason is that probability and its associated concepts govern much
of our lives
CHAPTER 1: Data and Statistics
Statistics- Yikes!
Thats what most people think when they hear or read the word Statistics. While I wont
try to convince you that stats is more fun than a tropical vacation on a white sand beach,
I would like to point out a
SAMPLING DISTRIBUTIONS
* In this lesson, we are going to learn about sampling distributions and confidence
intervals.
A sampling distribution - is a distribution of a statistic with a specific sample size . For
example below is a sampling distribution of
BUQU 1230: Fall 2016
MIDTERM # 1
Instructor: Ulrieke Birner
Welcome to your first midterm! Including this page there are SIX pages to this test. You have one
hour and twenty minutes to complete this test. Remember to read each question slowly, to think
ab
MIDTERM # 1-Spring 2016
Instructor: Ulrieke Birner
Welcome to your first midterm! Including this page there are 7 pages to this test. You have one hour
and twenty minutes to complete this test. Remember to read each question slowly, to think about what
th
MIDTERM # 1- Spring 2016
Instructor: Ulrieke Birner
Welcome to your first midterm! Including this page there are 7 pages to this test. You have one hour
and twenty minutes to complete this test. Remember to read each question slowly, to think about what
t
BUQU 1230- ASSIGNMENT 3
A bank has the following data on the gender and marital status of 200 customers. 20 customers are male and
Single, 120 are male, and 50 are married and female.
a.
Make a summary contingency table to represent the above data.
Male
F
ASSIGNMENT 4: BUSINESS STATISTICS-
1.
A random sample of ten examination papers in a course that was given on a pass or fail basis showed the
following scores.
Paper Number
Grade
Status
1
2
3
4
5
6
7
8
9
10
65
87
92
35
79
100
48
74
79
91
Pass
Pass
Pass
Fa
BUQU 1230- ASSIGNMENT 2
Instructions: Using the Housing Data File :
1. a.Use Excels descriptive statistics tool to provide the summary
statistics for the customer jobless rate variable .
Jobless Rate (%)
6.81481481
Mean
5
0.19161212
Standard Error
2
Media
Data for question 2- see exam sheet for question
Business
Z score
42 -1.99078307
Business
53
55
Mean
74.95
56
Standard Error 3.700978
58
Median
77.5
60
Mode
90
65
Standard Deviat 16.55128
72
Sample Variance 273.9447
75
Kurtosis
-1.006665
76
79
Skewness
-0
BUQU 1230- ASSIGNMENT 1
Michelle Firth, Student ID: 100218834
Answer the following questions, using the data file called Restaurant
(available at our website under Assignment 1).
Questions:
1. How many variables are in the data set?
a. Three
i. Quality Ra
ASSIGNMENT 4: BUSINESS STATISTICS-
1.
A random sample of ten examination papers in a course that was given on a pass or fail basis showed the
following scores.
Paper Number
Grade
Status
1
2
3
4
5
6
7
8
9
10
65
87
92
35
79
100
48
74
79
91
Pass
Pass
Pass
Fa