statistics spring 2007. introduction dr. robb t. koether office: bagby 114 office phone: 223-6207...
DESCRIPTION
The Course The class meets in Bagby 106 at 1:30 - 2:20 MTWF. The text for the course is Interactive Statistics, 3rd ed., by Martha Aliaga and Brenda Gunderson.Interactive Statistics, 3rd ed. The web page for this course is at Course information is also available through Blackboard. BlackboardTRANSCRIPT
Introduction Dr. Robb T. Koether Office: Bagby 114 Office phone: 223-6207 Home phone: 392-8604 (before 11:00 p.m.) Office hours: 2:30-3:20 MTWR
Other hours by appointment E-mail: [email protected] Web page:
http://people.hsc.edu/faculty-staff/robbk
The Course The class meets in Bagby 106 at 1:30 - 2:20
MTWF. The text for the course is
Interactive Statistics, 3rd ed., by Martha Aliaga and Brenda Gunderson.
The web page for this course is at http://people.hsc.edu/faculty-staff/robbk/Math121
Course information is also available through Blackboard.
Introduction
Syllabus Lectures Assignments Page xi – Interactive Exercises Page xvi – Graphing Calculator
Grading
In the final average, these will have the following weights:
Category WeightAverage of quizzes & Excel 30%Average of the tests 50%The final exam 20%
Homework The homework is the most important part of this
course. Learning mathematics requires gaining
knowledge and understanding, but more importantly doing mathematics is a skill.
You should not expect to acquire a skill by listening to a lecturer talk about it. It takes practice.
Do all of the homework every day.
Homework
More importantly, do not put off doing the homework until the night before the quiz.
You will not be able to learn that much material in one night.
Most importantly of all, do not put off doing the homework until the day before a test.
By then it is too late to learn it.
Homework
At the beginning of each class meeting, I will spend up to 10 minutes working one or two homework problems in detail from previous assignments.
You may request a problem that you would like to see worked.
Of course, outside of class, I will help you with as many problems as I can.
Quizzes
Each Tuesday, after going over homework problems, there will be a 10-minute quiz.
The quiz will contain 1 to 3 questions taken from the previous week's homework assignments.
The problems will be copied verbatim from the book.
Excel Assignments
From time to time, as appropriate, I will assign small projects that will be worked using Microsoft Excel.
You will be allowed and encouraged to work in pairs on these assignments.
These will be graded with the same weight as the quizzes.
Tests
The test schedule is as follows:
Test Date Coverage#1 Fri, Feb 16 Chapters 1, 2, 3, 4#2 Fri, Mar 23 Chapters 5, 6, 7#3 Fri, Apr 20 Chapters 8, 9, 10, 11
The Final Exam
The final exam will be cumulative. It will be given in this classroom at the time
stated in the exam schedule. Everyone must take it. It will not be rescheduled. Do not schedule a flight home before the
exam! You will lose your ticket.
Attendance Attendance will be checked at the beginning of
each class. Two late arrivals will be counted as one
absence. The only valid excuses for missing class are
An illness which includes a visit to the Health Center or a doctor
An approved college activity A true emergency Any absence excused by the Dean of Students
Attendance
When assigning final grades, attendance will be taken into account.
Absences Action0 – 2 Grade bonus3 – 5 Neutral6 – 8 Grade penalty> 8 Withdrawal
Calculators
A calculator will be necessary for this course.
I strongly recommend the TI-83 or the TI-84.
The Honor Code
Quizzes, tests, and the final exam are pledged.
On Excel assignments you may work with a partner.
Classroom Etiquette During a lecture, you are free to ask
questions. It is polite to raise your hand first and wait
to be called on. You should not talk to other students while
I am talking. While working assigned problems in class,
you are free to talk to other students provided you are talking about the assigned problems.
Classroom Etiquette
Do not make leave the room during the class. If necessary, use the bathroom before coming to
class. If you are thirsty, get a drink before class.
Do not sleep in class. Do not work on assignments from other classes
during class. Do not read the newspaper during class.
The Scientific Method
Formulate a theory. Collect some data. Summarize the results. Make a decision.
The Scientific Method
Formulate a theory – Chapter 1. Collect some data. Summarize the results. Make a decision.
The Scientific Method
Formulate a theory – Chapter 1. Collect some data – Chapters 2 – 3. Summarize the results. Make a decision.
The Scientific Method
Formulate a theory – Chapter 1. Collect some data – Chapters 2 – 3. Summarize the results – Chapters 4 – 5. Make a decision.
The Scientific Method
Formulate a theory – Chapter 1. Collect some data – Chapters 2 – 3. Summarize the results – Chapters 4 – 5. Make a decision – Chapters 9 – 14.
The Scientific Method
Formulate a theory – Chapter 1. Collect some data – Chapters 2 – 3. Summarize the results – Chapters 4 – 5. Make a decision – Chapters 9 – 14. Theoretical underpinnings – Chapters 6 –
8.
Formulate a Theory
We are wondering whether a particular die is fair.
If it is fair, then the numbers 1, 2, 3, 4, 5, and 6 should come up equally often.
In particular, if we rolled the die 600 times, we expect to get each number 100 times.
Formulate a Theory
The theory that the die is fair will be tested by posing it as a question with two competing answers.
Question: Does the distribution of observed rolls match what we would expect to see if the die were fair?
Formulate a Theory
The possible answers (yes and no) are stated more precisely as two competing hypotheses:“Null hypothesis” The die is fair.
Any deviations from the expected observation are due entirely to chance.
“Research hypothesis” The die is not fair. Any deviations from the expected observations are
due to the bias in the die.
Collect Some Data
So we roll the die 600 times and get the following results.
Number 1 2 3 4 5 6Expected 100 100 100 100 100 100
Observed 97 97 96 90 102 118
Summarize the Results
Use the TI-83 or TI-84, and compute a special quantity:
2 = 4.62. If the die really is fair, then theory says that
we expect this calculation to yield the value 5, plus or minus a bit.
Make a Decision
Theory says that if the die is fair, then this value should be less than the critical value of 11.070.
Since 2 is less than the critical value, we conclude that the “null hypothesis” is correct:
The die is fair.