[Using Sakai] Random multi-part questions in Quizzes

[Horst Hohberger]

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Hi Karen,

thank you very much for replying to my problem! I am probably failing  
to understand something obvious. Let me give you a simplified  
concrete example. Say I have two exercises which I want to be  
randomly assigned to students, as follows:

- ---------------
Exercise 1:
It is known that defective items will be produced even on automatic  
assembly lines. A particular process typically produces 5%  
defectives. If the proportion of defectives exceeds 5%, the line must  
be shut down and adjusted.

a) [Short answer/essay] Set up the appropriate null and research  
hypotheses needed to detect a situation in which the proportion of  
defectives produced exceeds 0.05.

b) [Numeric response] A random sample of 100 items is selected and  
tested.  Of these, 7 are found to be defective. Use the normal  
approximation to find the P value of the test. The P value is ____

c) [Multiple choice] A random sample of 100 items is selected and  
tested.  Of these, 7 are found to be defective. Based on the P value  
of the test, do you think H0 should be rejected?

	(*) Yes			(*) No
- -----------------
Exercise 2:
Quality and reliability are becoming important aspects of computer  
hardware and software. Past experience shows that the probability of  
failure during the first 1000 hours of operation for the 16-kbit  
dynamic RAM produced by a United States firm is 0.2. It is hoped that  
new technology and stricter quality controls have reduced this failue  
rate. To verify this contention, 20 systems will be monitored for  
1000 hours and the number of failures will be recorded.

a) [Short answer/essay] Set up the appropriate null and research  
hypotheses.

b) [Numeric response] Let us agree to reject H0 in favor of H1 if the  
observed number of failures, X, is at most 1. In this way we are  
presetting α at what level? α is ____

c) [Numeric response] Suppose that it is essential that the test be  
able to distinguish between a failure rate of 0.2 and a failure rate  
of 0.1. Find the probability that the test as designed will be unable  
to do so. That is, find β if p=0.1. Find the power of the test if  
p=0.1. β is  ____  and the power is ____ .
- -----------------

So I would like a student to randomly get either Exercise 1 (in its  
entirety) or Exercise 2 (in its entirety). Instead of confusing the  
issue by detailing my futile attempts at achieving this, I'll simply  
ask, how do I implement this? Any help would be greatly appreciated!

Regards,

Horst

On Jun 13, 2009, at 12:03 AM, Karen Tsao wrote:

> Hi Horst,
>
> To create a random multi-part questions, here is what you can do:
>
> 1. Create the pools.
> 2. Create an assessment.
> 3. In the Edit Assessment page, click on the Edit link of the first  
> (default) part.
> 4. You will see options to random draw from question pools. You can  
> select a pool for the part.
> 5. To add another part, click on the Add Part link on the Edit  
> Assessment page.
> 6. Repeat step 3.
>
> Please let me know if this is not what you are looking for.
>
> Thanks,
> Karen
>
> On Thu, Jun 11, 2009 at 9:05 PM, Horst Hohberger  
> <horst at sjtu.edu.cn> wrote:
> Dear list,
>
> I couldn't find the following question in the archives. I make the
> usual apologies for being a comparative newbie and asking a possibly
> dumb question. I want to implement questions in the tests&quizzes
> section as follows:
>
> Exercise 1:
> One introductory paragraph with data/attachments, followed by  
> questions
>
> a) text-entry
> b) multiple choice
> c) fill-in the blanks
> d) ...
>
> I have implemented this for a single exercise, by creating the
> Exercise as a "part" and a), b), c) etc. as individual questions. If
> all questions in a given Part are displayed on a single web page (I
> found the setting) this works quite well.
>
> However, now I want to create a pool with random exercises of the
> above type. Then the procedure will not work, because a randomly
> drawn question may well include part a) from random exercise 1, part
> b) from random exercise 2 and so on. I tried using sub-pools, but
> they do not seem suited for this. Can anyone give me any advice on
> how to achieve random multi-part questions? I am using SAKAI 2.5.3.
>
> Regards,
>
> Horst
>
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