Fall Semester 2002 |
Tue Dec 17
Date: Tue, 17 Dec 2002 18:44:28 -0500 (EST) From: Adrian German <dgerman@cs.indiana.edu> To: A113 Fall 2002 Distribution List <dgerman@indiana.edu> Subject: A113 Final Grades A113 Final Grades have been posted. Evaluation points will be added tomorrow at noon. Please check the grades and let me know if you see any problems. If we need to make changes we need to make them tomorrow, before I turn the grades in to the Office of the Registrar. So please let me know. I want to thank you all for your dedication and hard work and to wish you a happy break and a happy new year 2003. ... AdrianFinal Exam today at 12:30 in TH A201.
Mon Dec 16
Here's the message of yesterday:
Date: Sun, 15 Dec 2002 15:24:02 -0500 (EST) From: Adrian German <dgerman@cs.indiana.edu> To: A113 Fall 2002 Distribution List <dgerman@indiana.edu> Subject: A113 Update: Grades, Exams, Evals Dear A113 Friends, The semester is coming to an end. All of the grades that we have (all of them) have now been posted and we tried to calculate as much of the final grades as we could. A total of 33 students now have a letter grade (most of them have taken the final exam early on Thu). The final exam is on Tue Dec 17 12:30-2:30pm TH A201 (as also listed in INSITE). Those that have taken the final early and are happy with their grade need not come on Tue. Those who do come have a chance to improve their grades if they do better than last Thu when they took the early final exam (which was meant as a hands-on review). The gradebook still contains some N/A's and some later's (an indication that some grades are still being worked on). Please make sure you contact me or any one of the TAs to clear your account of any late assignments or exams before Tue Dec 17 at the end of the day. After this date every grade that appears as N/A or later in the gradebook becomes a 0 (zero). I plan to post the final grades on Wed Dec 18 and to turn them to the Registrar's on Thu Dec 19. Please make sure you contact me for any questions you may have early next week, to see what we can do to help, if appropriate. Don't forget the bonus project. It's due at exam time, and it's worth one full assignment. The text of the bonus project is listed at this URL: http://www.cs.indiana.edu/classes/a113-dger/fall2002/notes/Eleven.html There will be one more way to collect an extra point, which is by turning in an evaluation for this course with the CSCI Department. The CSCI Dept. is collecting course and instructor evaluations for all classes and A113 is one of them. Included are instructions on how you can submit your evaluation for A113. You must submit your evaluation before Wed Dec 18 at noon (the day after the final exam, so I can include the bonus point. It doesn't matter what you write in your evaluation: as long as you turn it in you get an extra bonus point at your final grade.) I will receive a summary of usernames for those that have submitted an evaluation on Dec 18 at 4pm so I can use the list to add a bonus point. Please let me know if you have any questions. Here are the instructions, as promised: 1. Go to the following website: http://www.indiana.edu/~best/ 2. Under "QuizSite", choose STUDENTS 3. From the drop-down box, choose/instructor to be evaluated (example: CSCI-A113-dgerman) 4. Click PROCEED 5. Check "DO A CURRENT ACTIVITY" (Should say "Evaluation") 6. Click PROCEED Evaluation for requested instructor should be displayed 7. Answer Questions 8. To submit completed evaluation, click PROCEED at bottom of page Then wait. If student has multiple CS courses or course instructors, they will be enabled at that time to click SELECT ANOTHER COURSE button Please Note - Students are allowed a max 3 attempts to complete each evaluation. (They will be enabled to open each individual evaluation 3 times, whether or not they make any additions or changes.) Please help the department (and us) improve this class by describing what you liked and what you didn't like in the class. We thank you for your participation and for your interest in A113. Should you have any questions whatsoever please let us know. Sincerely, Adrian German, for CSCI A113 Fall 2002
Sun Dec 15
Thirty-three final grades have been calculated and posted.
They are not final until after the Final Exam (Tue 12:30-2:30pm TH A201).
All N/A's and laters will turn into 0's at the end of the day (11:59:59pm) that day.
Please clear your account (late homework grades) with your TA by then.
Let me know if you have any questions or concerns.
Sat Dec 14
All exams have been posted.
If your final letter grade appears as N/A it may be because:
Only about 22 grades can be computed as of this time.
Check the current situation here (A113-1285).
Remember you can retake the final and/or submit the bonus project for extra.
Fri Dec 13
Thu Dec 12
Exam is (of course) open book and open notes, but individual work.
(The final is still offered on Dec 17 as scheduled between 12:30 and 2:30 in TH A201. If you take it twice the highest of your two grades will be kept, so you can also take today's exam as a final exam review. Tomorrow there is a Practical exam in lab, the last one).
Wed Dec 11
Here are the optional makeups we will be administering today:
Tue Dec 10
Fri-Mon Dec 6-9
Wednesday we have a Practical One make-up. Here's what to practice.
Thu Dec 5
Wed Dec 4
Rest of notes to be posted Wednesday night, with grades.
Tue Dec 3
The material for this week is Chapter 6 and the beginning of Chapter 7 in Kirkup.
Sun-Mon Dec 1-2
Wed-Sat Nov 27-30
Date: Mon, 25 Nov 2002 22:14:05 -0500 (EST) From: Adrian German <dgerman@cs.indiana.edu> To: A113 Fall2002 Distribution List <dgerman@indiana.edu> Subject: A113 Update Thanksgiving Week Midterm and practical grades have been posted yesterday with a small set of practical grades to be posted shortly. Many people did well, and some did not do that well. For those that did not do very well there will be a chance to make up individually, in person, by individual appointment before Dec 10. I will post the make up midterm and practical on Tue 11/26 on the web site. Both will be optional, everybody can re-take them, but you must do this before Dec 10. This week we start a new topic: correlation and regression. The material for the rest of the semester will come from Chapters 6 and 7 of Les Kirkup. If you have any questions or concerns please let me know. ... AdrianThe midterm make up will ask you to use NORMINV and NORMDIST to plot the normal distribution and to find out cumulative relative frequencies between or below various values expressed in terms of the mean and the standard deviation that corresponds to a specific normal distribution. As for the make-up practical, what's needed is the ability to set up an experiment that makes use of uniformly distributed discrete random numbers (that simulate dice, coins) and then calculating the relative frequency of a desired outcome and, out of that, the probability of that outcome.
More details to be posted soon.
Tue Nov 26
The other six quizzes are now in review mode (disclosing the correct answers).
Lecture notes for Dec 3 sketched.
Mon Nov 25
Date: Mon, 25 Nov 2002 22:14:05 -0500 (EST) From: Adrian German <dgerman@cs.indiana.edu> To: A113 Fall2002 Distribution List <dgerman@indiana.edu> Subject: A113 Update Thanksgiving Week Midterm and practical grades have been posted yesterday with a small set of practical grades to be posted shortly. Many people did well, and some did not do that well. For those that did not do very well there will be a chance to make up individually, in person, by individual appointment before Dec 10. I will post the make up midterm and practical on Tue 11/26 on the web site. Both will be optional, everybody can re-take them, but you must do this before Dec 10. This week we start a new topic: correlation and regression. The material for the rest of the semester will come from Chapters 6 and 7 of Les Kirkup. If you have any questions or concerns please let me know. ... Adrian
Sun Nov 24
Sat Nov 23
Fri Nov 22
Thu Nov 21
Date: Wed, 20 Nov 2002 09:31:02 -0500 (EST) From: Adrian German <dgerman@cs.indiana.edu> To: A113 Distribution List Fall 2002 <dgerman@cs.indiana.edu> Cc: Fulya Erdinc <ferdinc@cs.indiana.edu>, Mieko Furuhashi <mfuruhas@cs.indiana.edu>, akoswara@indiana.edu, jasdande@indiana.edu Subject: A113 Labs Today Here are some questions that you may be asked in labs today as a review for both exams this week: a) plot the normal distribution with an average of 56.7 and a standard deviation of 2.3 (Hint: use NORMDIST, FREQUENCY, and divide the standard deviation units in 10 intervals each). b) given this normal distribution, and a score of 59 what percentage of the population scored below? above? between 54.4 and 56.7? below 54.4? (Hint: the mean and the standard deviation are really your ruler and compass when exploring a normal distribution). So this problem can be solved with just paper and pencil, and you don't even need that. c) using the same normal distribution as above what is the score for which exactly 75% of the population has scored below? (Hint: use NORMINV(75, mean, stdev, 1) but why?) A few answers to some of the posted problems: d) given that the sum of the faces on two dice is 6, the probability that one face is a 4 is 2/5 (that is, 0.4). e) in the game of 6 dice one should get $0.83255 on average for every $1.00 played so the game is unfair. That is to say that if you were to play 1000 times ($1000.00) you'd win $830.255 so you'd lose about $169.75 (again, so you can check results) f) for the two coin game the payoff is 7/8, that is you lose $0.125 (on average) for every $1.00 you pay (to participate in one round). So playing 1,000 times ($1000.00) you'd be winning $875 roughly. For d), e), and f) you should be able to set up the experiments already, and I believe you need the answers to verify that they do indeed match your findings. As reminder the exams are open-notes and open-book. The midterm covers mostly measures of central tendency (mean, mode, median) and dispersion (range, variance, average deviation, standard deviation), histograms, frequencies, relative frequencies, distributions, and probabilities as limits of relative frequencies. The normal distribution is a special type of distribution, defined in terms of a mean and a standard deviation of the sequence (or set) of values. Standard (z) scores are one way of comparing scores in distinct (different) normal distributions. The practical wants you to develop an experiment and measure the probability of some event. You will be asked to turn in one screen shot of your work and you will be able to write on its back anything that you thought would add to the screen shot in describing your experiment and its results. If you have any questions or concerns please let me know. ... Adrian
Wed Nov 20
to help you prepare for the exams.
Also, congratulations to Yukiko Tsujihata who correctly pointed out that
This is a rather technical issue, but can we see why that is so?
Tue Nov 19
Homework Four and lecture notes for next week also posted.
Mon Nov 18
The practical is on Friday (4pm).
What to study for the midterm?
Answer:
Both exams are open book and open notes but individual work.
The practical will be like any of the homework assignments and lab assignments.
You might get a problem like this:
Set up an experiment in Excel to find out the probability of getting three heads when you throw four coins.So hopefully this is a starting point in your preparation for the exams. Let me know if I can be of more help.
Sat-Sun Nov 16-17
Here are screen shots that show how the golden coin experiment was done:
Notice that the last picture is really big so we can see.
Also notice that for this problem to be really effective one needs to provide two fairly short, and somewhat persuasive solutions, that give different answers.
So here they are:
This way one of them must be incorrect (perhaps both?) and a carefully chosen experiment can tell which is incorrect and give a hint as to what the right answer might be.
Remember:
Fri Nov 15
I hope to provide more screenshots for the other experiments, later.
Thu Nov 14
FREQUENCY
IF
COUNTIF
(Any counting that we are doing is done in the context of our experiments).
We are getting ready to take the exams next week.
Review notes with sample exam exercises are forthcoming.
Wed Nov 13
Use the help notes in Excel for FREQUENCY to set up a test of your understanding.
That is, set this up:
Suppose a worksheet lists scores for a test. The scores are 79, 85, 78, 85, 83, 81, 95, 88, and 97 and are entered into A1:A9, respectively. The data_array would contain a column of these test scores. The bins_array would be another column of intervals by which the test scores are grouped. In this example, bins_array would be C4:C6 and would contain the values 70, 79, 89. When FREQUENCY is entered as an array, the number of scores corresponding to the letter grade ranges 0-70, 71-79, 80-89, and 90-100, are counted. This example assumes all test scores are integers. The following formula is entered as an array formula after you select four vertical cells adjacent to your data. The fourth number, 2, is the count of the two values (95 and 97) that are greater than the highest interval (89). So(This has been taken straight from Excel so your minute task for today is to find this in Excel, read it, and understand it. Also prove that you understand it by describing how you'd be using it in Homework Three).FREQUENCY(A1:A9,C4:C6) equals {0;2;5;2}
Reading assignment for Les Kirkup Chapter 3 is from pp. 85-121.
(Soon we are going to summarize what you need to review for next week's exams.)
Tue Nov 12
Mon Nov 11
Date: Mon, 11 Nov 2002 10:08:49 -0500 (EST) From: Adrian German <dgerman@cs.indiana.edu> To: A113 Fall 2002 Distribution ListSubject: A113 Update Today is Monday November 11. Here are the A113 news: 1. Wednesday in lab you can turn in Homework Two (for the first time if you didn't turn it in on time, or a revised version of it if you think you've had trouble with it the first time around). No penalty is involved. 2. Homework Three is now due Friday, in lab. We'll use most of tomorrow to clarify it further and to actually run an adequate simulation. Then, and on Thursday too, we'll be doing a few more simulations and probability estimates. 3. Notes on the web will be updated Monday night for the whole week. The Midterm is in class on Nov 21, and is a written, and open-book, open-notes exam. We'll have a Midterm Exam Review on Nov. 19, the lecture before the exam. The Practical exam is in lab, on Friday Nov 22. We'll post more details during the week. If you have any questions or need any help please let us know. ... Adrian
Fri-Sun Nov 8-10
Date: Fri, 8 Nov 2002 19:46:42 -0500 (EST) From: Adrian German <dgerman@cs.indiana.edu> To: Undisclosed recipients: ; Subject: A113 Update With Homework Three we start becoming more sensitive to what exactly the goal is in an experiment. In this case the goal is really simple as shown in class on Thursday: can an experiment produce a distribution that resembles a theoretical distribution closely? Well, yes, but under what circumstances? Remember the example discussed in class. All experiments must start small. Then they need become as big as they need be, but not bigger. So, in this case, can you (or should you) throw 1000 coins? The answer is: no. The question then is: why? Well, what are you trying to achieve? That is, can you obtain the same results with only ten coins? Twenty? Forty? 100? I'd through 20 coins 20 times first. Plot. Estimate the fluctuations by pressing F9 a few times. Then I'd throw 20 coins 1000 times, or 4000 times, and only then more (like 15,000). Plot the distribution every time and turn in the printed copy of the graph (only). Be careful not to print thousands of lines of spreadsheet though! The result of your report is needed, not the spreadsheet. Increasing the number of coins increases the number of outcomes. Then the number of times we need to run the experiment also increases so then the problem becomes unmanageable, and for 1000 coins (hard as it is to do that in Excel) perhaps about 10,000,000 trials would do justice to the experiment. Getting back to the purpose of the assignment, we need to produce the normal distribution with as little headache as possible. So the lecture on Tuesday will show you how two dice (and a bit of knowledge, or external thinking) would be enough. But more on that Tuesday. Meanwhile please let me know if you have any questions or if you need any help. I will be able to answer e-mail over the weekend, so let me hear from you if you have any trouble working this homework out. Thanks a lot for your interest, once again, and hope your weekend will be a great one. ... Adrian
Wed-Thu Nov 6-7
(For a practical exam, possibly).
How can you approach such a problem. Labs this week try to help.
Sat-Tue Nov 2-5
Fri Nov 1
Please log in to verify you can get in.
If you can't please let Adrian know (at dgerman@indiana.edu
).
Thu Oct 31
Wed Oct 30
Inwood.xls
that you might need for today's lab.
Lab Notes One posted.
Tue Oct 29
Lecture Notes One posted.
Homework Assignment One posted, will be discussed in class.
A113