
The exam room will be 4a58, unless you hear
otherwise (maybe two rooms, only 12 in
4a58, but only room with SPSS!)

Date: 5th of January (curse you Bill!)

Time: 09:00 – 13:00 – 4 hours

The room is open 30 mins before exam start

Written exam with all aids

A3-type: All written and printed aids, and PC
with access to internet and personal folders

SPSS 17.0 and Excel 2007 will be available

Note: NO MACS! Only PC.

When meeting at the exam you will need to
sign a ”PC-use”-note – you will get it at the
exam room

Rules for written examinations:
http://www1.itu.dk/sw118342.asp#516_9214
2





Rules for the use of PCs at exams:
http://www1.itu.dk/sw118342.asp#516_9214
2
Specific rules for the DEDA exam:
http://www1.itu.dk/graphics/ITUlibrary/Intranet/Uddannelse/Eksamen/PCregler/Regler%20for%20brug%20af%20PC%
20ved%20eksamen%20i%20Experimental%2
0Design%20and%20Analysis.pdf

Key points:

DO NOT USE EMAIL

DO NOT USE SKYPE OR OTHER CHAT
SOFTWARE

DO NOT USE ANY KIND OF NETWORK
SERVICE WHERE YOU CAN CONTACT
OTHERS

According to the guidelines you need to create a
document on the computer with your answers on it,
as well as:
 CPR number
 Name
 PC number
 Course name
 Exam date
 Remember to number the pages

This document contains your answers.

You must send your document to the printer before the
exam time runs out

The ”tilsyn” will pick up your print, and give it to you. If all
pages are out, you sign it.

The ”tilsyn” are old people, who know squat about IT. But
they know that they MUST summon the IT-department is
errors happen.
 I will be at the ITU in case something happenes. They have my number.


Save your document during the exam!
Write answers on paper also!

All exam questions are numbered. Use these
numbers when you write your answers.
Examples:
”Q24A: Mean = 22.2” (question where you calculate
something)
 ”Q11: A+B” (multiple choice question)



It does not has to be written this way, just make sure
we can identify which questions you are answering

Warning: May change a bit – needs
thorough testing to ensure balance

Exam is on a 100-point scale

3 sections:
 A) Multiple choice (30 points)
 B) Open questions (20 points)
 C) Calculation questions (50 points)

These are quick and relatively straight-forward
questions, which are aimed to get you comfortably
working with the exam

They are based on your knowledge of the course
material – you will find the answers in the course
material, but a lot faster to answer if you know the
curriculum

You answer by noting down the number/numbers of
the response options. E.g.: ”Q2, 1” or ”Q4, 4 and 5” – or
similar.

3. What does a significant test statistic tell
us?

1.
2.
3.
4.
There is an important effect.
The hull hypothesis is false.
There is an effect in the population of
sufficient magnitude to be scientifically
interesting.
All of the above.

9. Which of the following terms best
describes the sentence: ‘In a blind-tasting,
people will not be able to tell the difference
between margarine and butter’

1.
2.
3.
4.
A directional hypothesis
An operational definition
A null hypothesis
A non-directional hypothesis

These are focused on testing your ability to
think correctly about experiment design,
hypothesis testing etc.

There will be 4-6 of them, each with a few
sub-questions
20. Read the following description of an experiment and answer the
following questions:
20B) What experimental design is used?
20C) What were the independent and dependent variables used?
The effects of shift-patterns on employee performance
Concerned with falling profits, a big insurance company recruits a famous
torturer to see if the performance of their telephone sales division could be
improved. The torturer first compares the number of sales made by
telephone sales operatives working on the company´s existing three
different shifts (morning, midday and evening). A significant difference is
found between the three groups on this measure, and it is concluded that
shift-pattern affects operative’s performance.
20D) Not satisfied with the performance of any of the three groups, the
company asks the torturer to experiment with ways to raise performance.
The torturer randomly selected two groups of sales operatives. One group he
asks to work as they normally do, from 9-5 on a Monday (irrespective of which
shift they normally work on). The other group he asks to work as they normally
would do, from 9-5 on a Monday, while at the same time he whips them,
sharpens his headman´s axe and verbally threatens them to sell more.
Afterwards, he collected data on their sales performance. The group that was
threatened and whipped performed 25% better in terms of number of sales.
The torturer concluded that the company should regularly whip and threaten
their sales staff to improve performance.
What type of experiment design did the torturer use? Define the
independent and dependent variable/-s.

This is where you will be applying statistical tests in
practice

Questions very similar to those from the exercises – prepare
by solving them again

You can calculate them by hand, in SPSS or Excel --- but you
may be asked to include SPSS outputs, graphs, scatterplots
or similar in the Word-document you hand in, so SPSS is
unavoidable for some questions.

Remember your tables for finding critical values of test
statistics (SPSS gives you significance, but just in case)
24. An experiment is performed to see if eating ice-cream makes people
happier. Ten individuals provide blood samples from which endorphin levels
are measured after eating best stracciatella ice-cream money can buy. This
is done twice, once before and once after 30 minutes' of ice-cream eating.
The scores are shown below (high endorphin level corresponds to high
degree of happiness).

Subject
1
2
3
4
5
6
7
8
9
10
Before eating ice-cream
5
4
6
7
3
4
5
1
2
3
After eating ice-cream
7
7
8
9
2
4
6
7
4
1

24A) Calculate the mean and standard deviation for each
condition. (Use the formula for the standard deviation that
gives the standard deviation as an estimate of the
population SD!)


24B) Perform a dependent-means t-test. Is there a statistical
significance between the two samples? Does eating ice
cream make people happier?

24C) What problems are there in performing this
experiment, in practice?

Some final comments:

Remember you can copy and paste from
SPSS output directly into your Worddocument

The same for Excel (should you choose to use
Excel)