Assignments Fill out this form to do the assignments or see your scores.

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1 Assignments Assignment schedule General instructions for online assignments Troubleshooting technical problems Fill out this form to do the assignments or see your scores. Login Course: Statistics W21, Summer, UC Berkeley First Name: Student ID: address on record at the beginning of the term: Last Name: My Scores on Past Assignments Assignment Schedule Reading Assignment Due Answers 1 of 8 11/29/12 10:49 AM

2 0. Introduction Have you read the syllabus and instructions? 1. Preface Mathematical prerequisites 2. Reasoning and Fallacies 3. Statistics 4. Measures of Location and Spread 5. Multivariate Data and Scatterplots, Association 6. Correlation and Association, Computing the Correlation Coefficient 7. Regression 8. Regression Diagnostics, Errors in Regression Reasoning and Fallacies Data taxonomy, histograms and percentiles Measures of location and spread: mean, median, mode, IRQ, range, SD, Markov's and Chebychev's Inequalities Scatterplots and association: reading scatterplots, linearity and nonlinearity, homoscedasticity and heteroscedasticity, outliers Correlation: eyeball estimates of r, heuristics, facts, standard units, computing the correlation coefficient Regression: the equation of the regression line, interpolation, extrapolation Regression diagnostics and regression errors: residual plots, regression fallacy, rms error of regression date Jun 19, 11:59:30 Jun 19, 11:59:45 Jun 20, Jun 21, Jun 25, Jun 26, Jun 27, Jun 28, Jul 5, posted? 2 of 8 11/29/12 10:49 AM

3 9. Counting 10. The Meaning of Probability: Theories of probability 11. Set Theory: The Language of Probability Counting: fundamental rule of counting, combinations, permutations The Meaning of Probability: Theories of Probability Set Theory 12. Categorical Logic Categorical Logic 13. Propositional Logic 14. Probability: Axioms and Fundaments 15. The "Let's Make a Deal" (Monty Hall) Problem 16. Probability Meets Data 17. Random Variables and Discrete Distributions 18. The Long Run and the Expected Value Propositional Logic Axioms of Probability Conditional probability, multiplication rule, independence, and Ba' rule The sample sum and the Binomial distribution Random variables and discrete distributions Expected Value 19. Standard Error Standard Error Jul 10, Jul 11, Jul 12, Aug 9, Jul 16, Jul 17, Jul 19, Jul 23, Jul 24, Jul 25, Jul 30, no 3 of 8 11/29/12 10:49 AM

4 20. The Normal Curve, the Central Limit Theorem, and Markov's and Chebychev's Inequalities for Random Variables The Normal Curve, the Central Limit Theorem, and Markov's and Chebychev's Inequalities for Random Variables Jul 31, 21. Sampling Sample surveys and sampling designs Aug 1, 22. Estimating Parameters from Simple Random Samples Estimating a parameter from a random sample; bias, SE, and MSE of estimators Aug 2, 23. Confidence Intervals Confidence intervals for the population mean: the meaning of confidence level and coverage probability Aug 6, 24. Hypothesis Testing: Does Chance explain the Results? Hypothesis Testing: Does Chance explain the Results? Aug 7, 25. Does Treatment Have an Effect? Does Treatment have an Effect? Aug 8, 26. Testing Equality of Two Percentages Testing whether two percentages are equal Aug 9, no 27. Approximate Hypothesis Tests: the z Test and the t Test Approximate Hypothesis Tests: the z Test and the t Test Aug 9, no 28. The Multinomial Distribution and the Chi-Squared Test for Goodness of Fit The Multinomial distribution and the Chi-Squared Test for Goodness of Fit Aug 9, no General Instructions for Assignments 4 of 8 11/29/12 10:49 AM

5 Your browser must be configured to accept cookies, to allow pop-up windows and, to use JavaScript and Java. Generally, it is a good idea to set up your browser to verify each document every time it is loaded, rather than to use a cached copy. That will ensure that you have the most up-to-date version of every assignment. SticiGui assignments combine forms, instructions, and interactive tools to reinforce the material presented in the chapters and to assess your understanding. The assignments use two frames. The upper frame has the instructions and a form for your responses; the bottom frame has tools you might need to solve the problems, such as graphs, calculators, etc. To access the assignments, you must provide the following identifying information: last name, first name, student ID, address. At the bottom of the instruction frame, after all the questions, there are three buttons: one to submit the assignment for grading, one to save your intermediate results on your computer, and one to clear the answer form. You must click the submit button to send your answers to be graded. After you click the submit button, you must click another button to confirm that you really want to submit your answers for grading. Click the "OK" button once only if you double-click, it will submit your answers twice and you will lose one of your chances to submit the assignment. The window that contained the problem set will show a confirmation screen (from AutoGrader) giving your score and telling you how many times you have submitted the problem set so far. It might take up to 30 seconds for the confirmation screen to appear, depending on web and server traffic. Be patient. If you get the confirmation screen, the server definitely received your submission. You can also see your scores by clicking the "My Scores on Past Assignments" button near the top of this page, just below where you type in your login information. After the due date, there will be no "submit" button. If the submit button is missing, but the assignment is not yet due, the clock on your computer is mis-set. Your computer's clock needs to be set to the time zone that the course is taught in (Pacific Time, if this is a UC Berkeley course), and to the correct day. If it is not, re-set the clock, clear the browser's cache, and re-start the browser. The submit button will come back. (In Firefox 13 on the mac, to clear the cache go to the Firefox->Preferences->Privacy menu. There's a link for "clear all current history." Click that link. That brings up a dialog box with tic boxes. Tic the boxes for cookies, cache, and offline website data, then the "Clear Now" button.) To see your grades, you need to enter your name, address, and SID, to protect your privacy. Click the button just under the assignment list, near the top of this page. Also, if you go back to the assignment after the due date, you can see the correct answers to your unique version of the assignment. Many of the questions and data in assignments have a random component. 5 of 8 11/29/12 10:49 AM

6 Different students get different questions and different data. You are graded based on the questions and data you receive. Differences in question wording can be subtle: If you work with other students, be sure to answer your version of the question. You can save intermediate results on the assignment using a button at the bottom of the instruction page sort of. The assignments also save themselves as a cookie on your computer when you submit them. Because the cookie is stored on your computer, you cannot access the answers from a different computer (or even a different browser on your computer). Warning: Cookies are volatile, not reliable. Some events will cause or require your cookies to be deleted. And they "expire" after a few days. Always write down your answers on paper in case the cookie is deleted. You've been warned. You can use different computers for different assignments. After filling out the identifying information at the top of this page to access the assignments, your browser will look for a cookie with a record of your previous work on the assignment on your computer. If it finds a cookie, the assignment will fill in your previous answers. That is the last thing that happens when the assignment loads. Be patient. Do not scroll, click or type while the assignment page is still loading. If the computers does not find a cookie, the answer fields will be blank. Questions with multiple-choice answers. There are two types of questions with multiple-choice answers. The first kind allows you to select only one response. The second kind asks you to "select all that apply." How to select more than one answer depends on the computer operating system and browser. In Firefox on unix and linux systems, click each answer you want to select; clicking an answer again de-selects it. On Windows systems, hold down the control (ctrl) key while clicking each response to select more than one. On Macintosh systems, hold down the "command" key while you click to select multiple responses. In such "multiplemultiple-choice" questions, if you select an answer that is not correct, or fail to select one that is correct, you will not receive credit there is no partial credit. Numerical answers. The grader strips commas from numbers, so you are free to punctuate numerical responses. If your response includes a percent sign at the end, your numerical answer will be converted to a percentage (divided by 100). Scientific notation (e.g., 4.23e-7 as shorthand for ) will work; do not put a space between the digits and the letter "e." Questions that do not have an exact numerical answer accept a small range of answers as correct. The precision required depends on the problem statement. When in doubt, don't round off your final answer. In this class, there is no such thing as an answer that is "too precise." Never round off intermediate calculations. The chapter exercises accept arithmetic expressions as answers, but these submitted homework assignments, graded by the server, do not. For instance, if the answer is supposed to be 50%, the SticiGui in-chapter exercises will accept 50%, 0.5, 1/2, 50/100, 1/sqrt(4), etc., as correct. But the homework assignments the problems you access through this login page will only accept 50% or 0.5. The server will count 50/100 or 1/sqrt(4) as wrong answers. 6 of 8 11/29/12 10:49 AM

7 Troubleshooting Most technical problems with the online book and assignments have one of three causes: 1. Using a browser that is not supported, or that is not configured correctly. See minimum system requirements to run SticiGui. 2. Scrolling, clicking or typing before the assignment page is fully loaded. Be sure to wait until the page has loaded completely before you do anything. The cursor should be normal, no hourglass or spinning wheel. The status bar should have a message like "done" or "loaded." 3. Corrupted cookies or cookies that have grown too big. See cookies. If you can't log in, be sure you selected your course from the drop-down menu. If the submit button is missing but it is before the due date, the clock or calendar on your computer is set incorrectly. Your clock needs to be set to the time zone in which the problems are assigned (probably Pacific Time) and to the correct day. If it is not, re-set the clock, clear the browser's cache, and re-start the browser. The submit button will come back. If the server says you have submitted the assignment more times than you remember submitting it, you might have double-clicked the "OK" button. The server cannot mis-count the number of times you submitted the assignment. If, when you try to access the problem sets, you get an error message that starts like this, delete the cookies (see below): Bad Request Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit. Cookie: 0x... Cookies Cookies are small text files stored on your computer. SticiGui uses cookies to store your answers to assignments to homework assignments on your computer and to remember your student ID when you log in to do an assignment or check your scores. Cookies are not reliable: many things will cause them to be deleted or require them to be deleted. You might get an error message that you need to clear the cookies in your browser. When you delete the cookies, the answers stored on your computer will be erased, but the server will still retain your submitted answers and your scores only the record on your computer is affected. Current browsers allow you to delete cookies easily, but the command is in different menus in different browsers and on different operating systems. 7 of 8 11/29/12 10:49 AM

8 1997. P.B. Stark. All rights reserved. Last generated Thu Nov 29 10:47:14. Content last modified 18 June 21:43 PDT. 8 of 8 11/29/12 10:49 AM