Welcome to Statistics 21, Summer 2010. Please read this page completely. The assignment schedule is posted. If you do not complete the first two assignments on time, you will be dropped from the course. To see the due dates and log in, first select this course from the drop-down menu. Then read the entire page: The instructions and troubleshooting advice are crucial. Mozilla Firefox is the only browser supported. Keep the browser up to date with the latest updates and patches. Join the discussion group if you are enrolled in the course.

Webcast lectures. There are recorded lectures to go with every assigned chapter.

Description. Statistics 21 is a service course designed primarily for Business students. It is not very mathematical. Neither linear algebra nor calculus is required, although some concepts seem more natural if you understand integration and differentiation. You do need to be comfortable with math at the level of high-school algebra (e.g., the equation of a straight line, plotting points, taking powers and roots, percentages). Tight logical reasoning is crucial for success. The beginning of the course introduces reasoning and logic; there is a more mathematical treatment of logic in the middle of the course. The middle of the course involves a fair amount of combinatorics—counting. The emphasis of the course is critical thinking about quantitative evidence. Topics include reasoning and fallacies, descriptive statistics, association, correlation, regression, elements of probability, set theory, propositional logic, chance variability, random variables, expectation, standard error, sampling, hypothesis tests, confidence intervals, experiments and observational studies, as well as common techniques of presenting data in misleading ways.

The course uses the Internet to distribute information, promote discussion, and provide interactive exercises and examples. The textbook, topic schedule, assignments, and scores are online. You will need to use the current version of Mozilla Firefox to access the homework. Google Chrome and Apple Safari work for most things in the course, but not reliably for the first six homework sets. Microsoft Internet Explorer is not recommended: It is a security risk to you, it is not completely standards-compliant, and it does not work reliably with these materials.

Enrollment. All enrollment is through TeleBears. Enrollment is limited to 400 students. There is no waiting list other than the TeleBears waiting list. Don't ask.

Required Text: SticiGui Online Text. It is free.

Recommended Texts:

Relevant, Fun and Interesting Reading:

Homework assignments are due as posted online. You will not be able to access the problem sets until the semester starts. If you try to access the sets before then, you will get a message "this SID is not enrolled." That has nothing to do with your registration in the course. Be patient. Don't send me email about it.

The email address to access the homework is the email address you had on record in CalNet at the beginning of the term. Even though you need a Gmail address for the discussion board, the email address for homework access might not be your Gmail address.

Generally, four problem sets are due every week. They can be submitted early, but not late. Two assignments are due the first week of class.

No late assignments will be accepted, for any reason, including, but not limited to, Internet congestion, system crashes, natural disasters, theft, and your pet's dietary idiosyncrasies. Don't ask. If you wait until the last hour to do an assignment, you substantially increase the risk that server traffic will delay your submission. I can't help that and I won't be sympathetic. Plan ahead and pace yourself.

You are allowed to submit each assignment up to five times before the due date. The last submission (not necessarily the one with the highest score) counts. You can see your score after each of the first three submissions. After the fourth and fifth submissions, you can see your score and which problems you missed: The problems you missed are identified on the confirmation screen after you submit—not in the problem set itself. You only get that one chance to write them down, and there is no other way to see which problems you missed until after the due date. The problems are identified as (Qxx), which matches the Q-numbers in the assignment. Q-numbers and Problem numbers are not the same: Problems can have many parts, each of which has a Q-number.

After the due date of each assignment, you can see the correct answers by opening the assignment again. After the due date, when you answer each problem, you will see an X or a check mark, just like in the book chapters.

This class uses mastery based grading for the homework. You get credit for a homework assignment only if you get a score of 80% or higher on that assignment. If you score below 80% on an assignment, you get no credit for that assignment—it counts as a zero. You did not master the material adequately.

If your score on an assignment 80% or higher, the credit you get is your score. Thus, if I end up assigning 25 homework sets and your scores are five 70s, five 80s, five 90s and ten 100s, you get no credit for the five 70s. Your homework score is

(5×80 + 5×90 + 10×100)/25 = 74%.

The homework assignments are substantially more difficult than the final exam. They often require quite a bit of thought. Some ask you to apply the material to more complex problems that—superficially—are not like any problem in the book. In contrast, the depth of exam questions is limited by the duration of the exam. Exam questions are more like the questions on the practice exams and in the book chapters. I design the exams so that the faster students will finish in less than half the time available. Most students do not feel time pressure in the exams. Historically, the first students leave finals after about an hour and ten minutes.

Midterm: There is no midterm in Statistics N21.

Final Exam: The final will be on 13 August 2010 from 8-11am. You will be assigned to take the exam in one of two rooms, either 155 Dwinelle or 2050 Valley Life Science Building. Be sure to go to the room you are assigned to! The room assignments will be announced by 10 August. The final is cumulative. Practice materials are available online.

If you will not be on campus for the final, it might be possible to take a proctored final off campus; please contact the course manager (not the professor).

You must bring a 100-question scantron form (form 882), a number 2 pencil and your student ID to the final. You may bring two pages of notes, front and back (4 sides, typed or handwritten), a calculator, a sliderule, a pen, extra scantron forms to auction to people who forgot to bring their own, etc.

The calculator may not have any functions other than the following six: addition, subtraction, multiplication, division, percents, and square-roots. It may have a one-number memory. The TI-503SV, HP-QuickCalc, and HP EasyCalc 100 are examples of calculators that are permitted. The TI-503SV has a list price of $5 and can be purchased online for about $3.

Calculators with any statistical or probability functions (such as mean, standard deviation, correlation coefficient, regression, factorials, permutations, combinations, t-tests) are prohibited. "Scientific," "financial," and graphing calculators are prohibited. In particular, the TI-30X, TI-73, TI-83, TI-84, TI-89, HP-12C, HP-20b, HP-10s, and HP-40gs are prohibited. Calculators that have wireless communication or the ability to store notes, webpages, images, or the like are prohibited. You may not use any wireless device (including cell phones), PDA, computer, scratch paper, etc.

Grading. To pass the course (with a D), you must make at least 66% on the homework and at least 60% on the final. If you meet both criteria, your course grade is the average of your homework and final grades, with equal weight. If you get below 66% on the homework or below 60% on the final, you fail the course.

Grades will not be "curved," so you are not in competition with anyone else. It is possible for everyone to make an A (or an F). Grades on assignments and exams will be posted online. The course grade will be posted in BearFacts.

HOWEVER, I will take points off your grade if you violate the email policy, the office hours policy, or the discussion board policy.

Academic Honesty. Do your own work. Collaborating on homework is fine—but copying is not, nor is having somebody else submit assignments for you. Cheating will not be tolerated. Anyone found cheating will receive an F and will be reported to the Student Conduct Office.

Course Manager. The course manager is Tracie Littlejohn, tlittlejohn [at] unex [dot] berkeley [dot] edu, 602-930-6480. She is your primary contact to ensure that you have the technology needed to access course material. She also deals with arrangements for proctored off-campus exams for those students who cannot be on campus for the final.

Graduate Student Instructors (GSIs). The GSIs for the course, and their online offices, are as follows:

Name Email Online Office
Derek Bean dbean85 [at] gmail [dot] com http://uc-d.na4.acrobat.com/stats_n21_bean
Tessa Childers-Day tessa.l.childers+summer21 [at] gmail [dot] com http://uc-d.na4.acrobat.com/stats_n21_childersday
Tatiana Gabor tatiana [dot] gabor [at] gmail [dot] com http://uc-d.na4.acrobat.com/stats_n21_tanner
Christine Ho cho [at] stat [dot] berkeley [dot] edu http://uc-d.na4.acrobat.com/stats_n21_cho
Wayne Lee lwtai [at] stat [dot] berkeley [dot] edu http://uc-d.na4.acrobat.com/stats_n21_lee
Ngoc Tran tran [at] stat [dot] berkeley [dot] edu http://uc-d.na4.acrobat.com/stats_n21-tran
Nancy Wang yqnancy.wang [at] gmail [dot] com http://uc-d.na4.acrobat.com/stats_n21_wang

GSIs will hold office hours online and in person at the Student Learning Center and in Evans Hall.

Office hours. You can attend up to 5 hours per week of online office hours. You can join an office hour session only during the first 10 minutes of the session. You may not ask questions about material you have not read. You may not ask questions about problem sets you have not submitted at least once. There is a limit of 15 students at a time per office hour "room." Attendance is first-come, first-served. These rules were developed over four years to make office hours manageable, effective, and efficient. If you violate these rules, points might be deducted from your course grade.

Office hours. Links are to online office hours. Entries without links are for in-person office hours. SLC is the Student Learning Center. IHC is the International House Cafe (Bancroft at Gayley)
Hour Monday Tuesday Wednesday Thursday Friday Saturday Sunday
8:00 AM Nancy, Ngoc Ngoc Ngoc Nancy, Ngoc Nancy, Ngoc Nancy, Ngoc, Ngoc
9:00 AM Nancy, Ngoc Ngoc Ngoc, Tessa Nancy, Ngoc Nancy, Ngoc, Tatiana Nancy, Ngoc, Tatiana Nancy, Ngoc
10:00 AM Ngoc, Tessa (SLC) Nancy, Ngoc, Tessa (SLC) Ngoc, Tessa Ngoc, Tessa Ngoc, Tatiana Ngoc Nancy, Ngoc
11:00 AM Nancy, Tessa (SLC) Nancy, Tessa (SLC) Tatiana, Tessa Nancy, Tessa Nancy, Tatiana Christine (IHC), Nancy Nancy
12:00 PM Nancy Nancy Derek, Nancy (SLC) Nancy Nancy, Tatiana Christine (IHC), Nancy Nancy
1:00 PM Tatiana Tatiana Derek, Nancy (SLC) Tatiana, Wayne (SLC) Tessa Christine (IHC)
2:00 PM Tatiana Tatiana (SLC), Tessa Nancy (SLC), Wayne Tessa, Wayne (SLC) Tessa
3:00 PM Christine , Wayne Christine, Tatiana (SLC), Tessa Christine, Nancy (SLC), Wayne Christine, Tessa Derek (SLC), Tessa Tessa
4:00 PM Christine, Wayne Christine, Ngoc (307 Evans), Wayne Christine Christine, Ngoc (307 Evans) Derek (SLC) Tessa
5:00 PM Tatiana, Wayne Ngoc (307 Evans), Tatiana, Wayne Tessa Ngoc (307 Evans) Tessa
6:00 PM Tatiana, Tessa Tessa Tessa Tessa Tessa
7:00 PM Tessa Tessa, Wayne Nancy Tessa Tessa
8:00 PM Derek, Tessa, Wayne Wayne Derek, Nancy Derek, Wayne Ngoc Ngoc Derek
9:00 PM Christine, Derek, Wayne Christine, Derek Christine, Derek, Nancy Christine, Derek, Wayne Ngoc Ngoc Derek
10:00 PM Derek Derek Ngoc

Online Study Hall. There is an online study hall to collaborate with other students: http://uc-d.na4.acrobat.com/stats_n21_studyhall.

Discussion Board and Email policy. Please do not send me email unless you have a [real] emergency, need an exam accommodation, or need to discuss something privately. Please do email me to make bug and typo reports. But before you conclude that something is a bug, be sure to read the instructions. Please do not email me with questions about the course or course material—there are simply too many students enrolled for me to be able to respond to individual questions. Use the discussion board instead.

You must sign up for the discussion board or you will miss crucial information. You are responsible for reading the discussion board. Never post your SID to the discussion board. Do not post specific questions about homework problems to the discussion board before that homework is due. Do not post your solutions to homework problems before the homework is due. If you break any of these rules, you might be banned from posting to the discussion board and points might be deducted from your course grade.

To sign up for the discussion board, go to http://groups.google.com/group/ucb-stat-n21-su-2010 and request to be added to the group. Include your SID in the request so that I can confirm that you are enrolled in the course.

Please post questions about the material or the administration of the course to the discussion board—but before posting a question, read the discussion board (and the syllabus and other course materials) in case the question has already been answered. I will try to answer questions posted to the discussion board within 12 hours, on weekdays. Use email—not the discussion board—for personal matters, and please send that email to a GSI, not to me. If the GSI cannot help you, he or she will forward the question to me.

Accommodations for Disabilities. If you have a disability that requires an accommodation for the midterm or final exam, please have your Disabled Student Program Specialist send me a formal request by email by 15 July 2010.

Advice for success. Try to solve all exercises in each chapter: Some show up on exams. Read all homework and exam questions carefully, and take them literally—don't try to second-guess what is meant. Attend office hours. Post questions to the discussion board. Check the discussion board daily. Search the discussion board for answers before posting a question.

Most general questions about the course have answers in this page, the assignments page, the discussion board, or the class announcements. If you ask me a question that is answered in writing on the course website or the discussion board, you will irritate me. I'm not fun when I'm grumpy. Trust me.

Bug and typo reports. I am very grateful to be told about bugs and typos by email. But an error message caused by failure to follow directions is not a bug. If you are reporting a bug, be sure to include the following information, or it is unlikely that I can help you or fix the problem:

  1. your student ID number
  2. the browser you are using (Netscape, Mozilla, Opera, Safari, Chrome, Internet Explorer), including the version
  3. the operating system you are using (Mac, Windows, unix, linux), including the version
  4. a description of what you were doing when the problem occurred, including the URL of the page that has the problem
  5. a description of the symptom, including the wording of any error message you received
  6. the time and date the problem occurred.

Before you conclude that unexpected results are caused by a bug,

  1. Make sure you are using a compatible browser and a compatible version of the browser.
  2. Make sure your browser has JavaScript, Java, and cookies enabled. I recommend that you accept only cookies that get sent back to the originating server, not "third-party" cookies.
  3. Make sure you do not try to scroll down the page before the page has fully loaded.
  4. Try a "hard reload:" hold down the shift key while reloading the page.
  5. Clear the browser's cache. In Firefox, this is in the Tools->Options->Privacy->Cache menu. Click "Clear Cache Now." While you are at it, go to the Tools->Options->Privacy->Cookies menu, and tell Firefox to accept cookies for the originating site only.
  6. Try restarting the browser after clearing its cache.
  7. Try restarting the computer.
  8. If the problem is that you cannot access an online assignment,
  9. If the problem is that applets display incorrectly, try turning off all graphics acceleration.

Tutors and other academic support.

Student Learning Center. The Student Learning Center (SLC) offers help with introductory statistics classes. The SLC devotes special resources to this course at times to be announced.

Outside tutors. The Statistics Department has a list of people who have offered to tutor introductory statistics. The Department does not vouch for the proficiency of the tutors, and makes no recommendation, but keeps a list as a service to students.