Welcome! Log In Create A New Profile

Advanced

No Calculator + Decision Tree's

Posted by Kyle 
Announcements Last Post
Announcement SoC Curricula 09/30/2017 01:08PM
Announcement Demarcation or scoping of examinations and assessment 02/13/2017 07:59AM
Announcement School of Computing Short Learning Programmes 11/24/2014 08:37AM
Announcement Unisa contact information 07/28/2011 01:28PM
Forums Messages New
Kyle
No Calculator + Decision Tree's
October 31, 2010 09:37PM
Hey all,

I am quite concerned in regards to the "No Calculator" rule in the exam coming up. Looking at the past paper, the table given at the end gives absolutely no indication of the entropy, or the other log functions for that matter, only the information gain.

Do we just need to work out the logs in our heads? Anyone got an idea?

Cheers,

Kyle
Reply Quote
JoJenkinson
Re: No Calculator + Decision Tree's
November 01, 2010 05:48AM
Kyle,

As I understood it, I think you look up the p. so if the fraction in the log is e,g, 1/4 you look up .25 in the table and get the answer without those tricksy logs.
Reply Quote
rezrovs
Re: No Calculator + Decision Tree's
November 01, 2010 01:17PM
Even still, when you have fractions like 4/14 times 0.98? I can't do that in my head even without the pressure of an exam going on. I'm taking my calculator and asking the invigilators when I get there...
Reply Quote
Kyle
Re: No Calculator + Decision Tree's
November 03, 2010 08:51AM
Yelloa,

Got a response from our lecturers here:

Quote

Good day,

Please read response from Prof Etienne van der Poel, also in charge of this module: "I've checked the October paper. I don’t see a need for a calculator in the Oct paper".

Regards,

Dr S Belabbes
Reply Quote
avatar
brettc
Re: No Calculator + Decision Tree's
November 03, 2010 09:05AM
So is it safe to assume that we won't get any decision trees?
Would be quite a bummer as decision trees are fairly easy...
Reply Quote
Kyle
Re: No Calculator + Decision Tree's
November 03, 2010 09:11AM
I wouldn't assume anything. At most I'm assuming they give us simple fractions.
Reply Quote
Anonymous User
Re: No Calculator + Decision Tree's
November 03, 2010 10:14AM
From the Prof's "I've checked the October paper. I don’t see a need for a calculator in the Oct paper".

This probably means the fractions are easy to work with, i.e. the prof will not need a calculator

anyway, crap like 3/14 * (0.95) = ??? is still messy, I've practice these... but too easy to make mistakes.
Reply Quote
Kyle
Re: No Calculator + Decision Tree's
November 03, 2010 10:32AM
As long as the fraction is a multiple of 10 or something simple like that, I't'd be ok:

Quote

= 3/10 * 0.98
= 3/10 * 98/100
= 294/1000
= 0.294

That kind of thing.
Reply Quote
avatar
brettc
Re: No Calculator + Decision Tree's
November 03, 2010 10:41AM
i think i'm gonna try my luck and take a calculator in with me.
Reply Quote
Newer Topic Older Topic
Sorry, only registered users may post in this forum.

Click here to login