# TMA4255 Applied Statistics, spring 2012

# Messages

[27/07/2012] The written continuation exam in TMA4255 is set at Wednesday August 8 at 9.00. Place will be announced at Studweb.

[25/05/2012] Todays exam paper with tentative solutions are found in the list of old exams at Exams.

[21/05/2012]

- Remember this week supervision in 656, 6etg sentralbygg 2 at 10-13 on Monday 21 and Wednesday 23.
- Several of you have asked for solutions to the V2008 exam. Sadly, this is not available. I have been in contact with the teacher that year and he did not have the solutions written up. I have not gone through the exam in detail and you see that V2008 differs from later and earlier years.

[30/04/3012] Link to scores for the TMA4255 project is found under the "Compulsory project" tab.

[26/04/2012] Activities before the exam: you may come to room 656, Simastuden, 6th etg, sentralbygg 2 to ask questions to the lecturer or TA (or just sit and work) the following three days. This is instead of standing in queue outside the lecturers office…

- Monday May 14, 10-12.
- Monday May 21, 10-13.
- Wednesday May 23, 10-13.

[12/04/2012] Tomorrow is the last lecture with new material (Part 7), and on Tuesday is the last exercise (Part 6+7). I need your feedback on the following:

- Next week (week 16) is the last week with lectures. I plan to give an overview of the topics by looking at concrete data problem situations - and then list some important aspects of each of the situations. I may also go into details on difficult concepts. What did you find was the most difficult to understand in this course? Are there any topics, examples, methods, models, concepts that you in particular want me to focus on next week? Do you want me to spend one of the lectures (e.g. last Friday) to look at one exam? (The lf for the last years should be easy to understand.)
- We have decided that on Tuesday 24, 12-13 in F4 (last exercise spot on the time table), Javad and Mette will answer questions about all exercises.
- Between April 24 and May 25 (exam date) we may have other activities. In general we often have specific timepoint where you can ask questions (at the office of the lecturer) or we may book a room for you to work together and the lecturer may be present to ask for questions. Please report back to Mette or the reference group what you want and when (date and time).

[22/04/2012]

- Today we started on Part 5: Statistical process control, which we will finish tomorrow. Exercise 10, next Tueday, cover this topic.
- Part 6: Statistical analysis of contingency tables, will be started tomorrow and finished on Thursday next week.
- There will be no lecture on Friday March 30.
- After Easter we will work on Part 7: Non-parametric statistics in the lectures on Thursday 12 and Friday 13 April.
- The last week with lectures is week 16, Thursday April 19 and Friday April 20. Then I will go through the course with drawings, slides and examples on the blackboard from earlier exams.
- The last exercise is on Tuesday April 24 - and then you may ask questions from all exercises.

In week 16 we also decide on dates for questions before the exam and other resources you might require.

REMEMBER: DOE deadline on Friday MARCH 30 at 12.00 at the latest!

To those of you going away on excursion : safe trip!

[12/03/2012] Part 4: Analysis of Variance (ANOVA) is the last large part of the course (parts 5-7 are smaller), and we are halfway through the topics of Part 4 in the lectures. We have talked about the one-way ANOVA, testing of homogeneity of variance and started on multiple testing. This week we will continue with multiple testing, blocked designs and then two-way ANOVA.

There are two exercises for this part. Exercise 8 will be supervised tomorrow - and you may solve Problem1 and Problem 2a. Next week you will also be able to solve Problem 2b-d and Exercise 9.

There was a significant decrease in the number of students present at the lectures last week (earlier around 40, and that week around 30). What has happened? It is important to not fall behind now. If you are struggeling - and want to me to clarify some concepts you just email me and we will find time to talk. Javad is also available for questions - in particular on Tuesdays 11-13 in Vegas.

[24/02/2012] Next week we have no lectures, and instead you may be supervised on your compulsory project. Javad is available on Tuesday Febr 28, 11-13 in Vegas, Thursday 12-14 in R10 and Friday 14-16 in F2. For information about the project go to the projects tab, directly here.

[16/02/2012] I just want to remind you that we are not using the text book (Walpole Walpole Myers Ye) for the Part 3: Design of experiments (DOE). We are instead using

- This week: Note: Factorial Experiments at Two Levels (availlable at the Lectures tab under L10, or directly at Note.
- Next week: Book chapter from Box Hunter and Hunter, will be available at the Lectures tab under L13, or directly at Book chapter.

Tomorrow I'll talk a bit about the compulsory project, so you may start to think what to do. The aim is that you (together with your TMA4255 friend?) perform 16 experiments with a continuous response (important!) and 3-7 factors at two levels, and write a short report about this - including statistical analyses.

We finish the DOE part next week, so in week 9 there are no lectures - only supervision of exercises and for helping you with setting up your project (supervision instead of lectures). We have decided that the project has to be handed in before Easter, and we are very thankful if you could write the report in English. Then candidate numbers will be available to use when you hand in the report.

Read more about the project from the Projects tab. It would have been great if you could browse through that page before the lectures tomorrow, so you may ask practical questions.

And one more thing: we have decided to sneak in at Vegas at 11 with Javad as TA on Tuesdays instead of the room 656 solutions which did not seem to work. But, remember Vegas is booked by ST2304 - so we are only there on their mercy…

[10/02/2012] CORRECTION: there are NO available rooms at Gløs 11-12 on Tuedays- but I have found a room locally at Dept of Math Science (that are not supposed to be used for teaching), omg. And Vegas is booked by ST2304. Javad will then be availble for questions at room 656 6.th floor of Sentralbygg 2 (not far from Vegas, just the elevator from 2 to 6th floor). We will evaluate this (number of people attending) soon.

[09/02/2012] Minutes (referat) from the meeting with the reference group can be read here, if you have comments please let me know. Other:

- CORRECTED: see above, Vegas only from 12. The supervision times at extended to 11.00-13.00 on Tuesdays, but 11-12 at room 656 in Sentralbygg 2 (Javad is TA).
- A special Valentines Day treat: For those struggling with R, bring your laptop top F4 on Tueday Febr. 14 at 12.15, and Mette will help with R and exercise 5. This is expecially for those who feel they spend more time on R than on understanding statistic- and have decided that they really want to use R. So far only 2 students said they will come (when I asked at todays lecture) so there is room for more, and we will work in plenum - so I hope this will be useful! Interpretation wrt statistics will also be dealt with.
- Remember that it is also possible to stop by the office of the TA or lecturer, or write an email and arrange a time slot (so you are sure that we are in). Too many hours are wasted on not asking questions…

[02/02/2012] On Tuesday 07.02 at 12.15 in the far corner in Vegas those of you who missed the R intro can join an interactive R-intro (hopefully we will not be more than 4-5 people - if we are more, we need to find another solution). In the rest of Vegas TA Javad will supervise Exercise 4 on multiple linear regression.

[31/01/2012] I see that some of us had problems choosing the correct natural log in MINITAB. It is under Calc-Calculator called Natural log (and NOT ln gamma - which gave a linear transf). It is important that you also do the theoretical exercise (Problem 1) and solve as much of Problem 2 using a pencil and a piece of paper. Remember, the exam is not using computer software!

[29/01/2012] Activities to remember:

- Tuesday January 31, 12.15 in Vegas: supervision of Exercise 3.
- Thursday February 2, F3 (NBNB), Chapter 12.1-12.4.

and on Friday lecure as usual.

Next week the TA and lecturer will meet with the reference group on Tuesday February 7 at 11.15-12.

Agenda for the meeting

- Status for TMA4255 – how are things going, and what changes do we want to make. In particular we talk about the book, the lectures, the exercises, R/MINITAB, Vegas/laptops.
- Dates and info regarding the compulsory project.
- Anything else?

Please contact the reference group (or lecturer) if you have input to the meeting. Attendence is of cause also possible, contact the lecturer if you want to attend. Meeting minutes (referat) will be posted here.

[19/01/2012] Exercise 2 will be supervised in F4 at 12.15-13.00 - in a session where the lecturer use MINITAB and the student bring their own laptops (and have MINITAB installed, or run remote session to cauchy as explained in the Software tab) and run MINITAB and discuss interactively. An interactive session with R is arranged the same day at 11.15-12.00 (R8) with the same strategy. Then R and Rstudio should be installed on your laptop (see the Software tab). Please prepare questions about statistics and MINITAB/R that we can answer together. If you do not have a laptop you may either team up with someone who has a laptop, or just come and take notes (and try this out on Vegas afterwards).

[17/01/2012] The following are instructions to run a remote resktop to a server at the Maths department where MINITAB is installed when you are at the Vegas computer lab (or at your windows laptop if you do not want to install MINITAB -but have the remote desktop program).

- Start-All Programs-Accessoires-Remote Desktop Connection
- New window: Computer: cauchy.math.ntnu.no
- New window: win-ntnu-no/username and password

The MINITAB installation at Vegas is not working at the moment but will soon (hopefully within a week), and in the meantime you use the remote desktop solution for this. If you want to run a desktop from the mac you should download the "Remote Desktop Connection Client" from the following address and follow the instructions: download.

[17/01/2012] Today you may attend the exercise 1 supervision in Vegas at 12.15 (personal supervision, no plenum action). Hints for MINITAB and R are given in the Exercise 1 problems (see the Exercises tab).

This year all registered student have access to Vegas, but if you are not a regular student (e.g. a PhD student) you may not have access. If you do not have access (please check first) email the lecturer with you card number (lower left corner on back of student card).

[13/01/2012] New room on Thursdays is R10 (except 02.02.2012, when we are in F3). The new room have 70 seats.

[12/01/2012] We decided today that the lectures are Thursday 12.15-14 and Friday 14.15-16, and the Exercises are Tuesdays 12.15-13. The first exercise will be in Vegas computer lab Tuesday January 17 at 12.15, see the exercise tab for tasks. Those of you who want access to the computer lab outside the exercise times need to upgrade your student card. List will circulate in the lecure tomorrw – the number on the lower LEFT corner (not the one starting with NTNU) need to be given.

The Joy with Statistics BCC programme is available in English from Hans Roslings gapminder page.

[11/01/2012] Lecture handouts for the first lecture is now availble from table of lectures under the Lectures tab. An introduction to MINITAB (sadly only available in Norwegian) and notes on population/sample and descriptive statistics are also available. The first exercise is available in the exercise table under the Exercises tab.

[10/01/2012] By answering this questionnary (10 questions!) you will aid me in making the lectures more adapted to your needs, and data collected here will be used to illustrate methods in the lectures. Your answers are submitted anonymously. Hope to see you on Thursday 12.15 in F3 for the start-up of the course.

[10/01/2011] This BBC program entitled "The joy of statistics/Moro med statistikk" is available at the Internet in Norway until Januar 11 – and if you have time I would very much encourage you to see it. Hans Rosling shows the importance and joy of statistics.

[19/12/2011] Pages available. First lecture is Thursday January 12, 12.15-14.00 in F3.