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Blogs > RaGe
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RaGe
Profile Blog Joined July 2004
Belgium9947 Posts
Last Edited: 2008-06-03 22:33:09
June 03 2008 21:33 GMT
#1
Ok basically I have a Statistics project due friday afternoon, and I've been learning my ass off the past few days but it doesn't seem like I will be able to learn everything in time to be able to make it without any clues.

If any of you could point out in what direction I need to go to solve one of the questions, I'd learn that specific part of the course and be able to solve it. It would lead to enormous gratitude.

We need to answer some questions, using the SAS Statistical Program and using the following dataset: clicky

I'll define the variables in english
² Huuralfalfa: average rent/acre of land where alfalfa is being planted on (1acre = 40.5 are)
² Huurgrond: average rent/acre of land for normal weeds to be harvested
² Koe: amount of cows / square mile
² Weide: percentage of the total barn land being used to keep the animals on
² Kalk: Ja(Yes) if extra chalc (kalk) needs to be used to process the alfalfa , nee(no) otherwise.

The questions:

1. Is there a difference between rent of land where alfalfa is going to be planted on or land that can be used for any weeds?
2. In some districts it's necessary to add kalk(chalc) to the landso it alfalfa can be plantes, does this make the rent cheaper?
3. Study if you can explain log(Huuralfalfa/Huurgrond) by squareroot(koe)

For every hypothese you must use alpha = 0.05.


Now is it just me or is this ridiculously hard? I dont expect you to answer the questions, I think that would be too much work, but guiding me towards what distributions/formula's I should use would be really nice.

Thanks in advance, even if you can't/dont wanna help.

Royo

Moderatorsometimes I get intimidated by the size of my right testicle
Xeris
Profile Blog Joined July 2005
Iran17695 Posts
June 03 2008 22:49 GMT
#2
some kinda chi square / z score testing O_O (for #1) I think.

twitter.com/xerislight -- follow me~~
RaGe
Profile Blog Joined July 2004
Belgium9947 Posts
June 03 2008 22:51 GMT
#3
k update:
In the first question you're supposed to note that the Huuralfalfa variable and huurgrond variable are both not normally distributed, but the difference of the variables is normally distributed. So I think I need to do a hypothesis test on that.
Moderatorsometimes I get intimidated by the size of my right testicle
imDerek
Profile Blog Joined August 2007
United States1944 Posts
June 03 2008 23:39 GMT
#4
ok then test null hypothesis: mu1 - mu2 = 0 against the alternative hypothesis: mu1 - mu2 != 0 (!= means not equal to)
Least favorite progamers: Leta, Zero, Mind, Shine, free, really <-- newly added
RaGe
Profile Blog Joined July 2004
Belgium9947 Posts
June 03 2008 23:44 GMT
#5
Thanks, any thoughts on the other questions?
Moderatorsometimes I get intimidated by the size of my right testicle
mjh
Profile Joined November 2007
United States133 Posts
Last Edited: 2008-06-04 00:58:55
June 04 2008 00:55 GMT
#6
second can be done in a linear model and adding an interaction. or you can probably do something with conditional probabilities or a contingency table.

third is a linear model with the transformations you mention.

edit: it also depends on what you've learned and what you're supposed to have at your disposal. those should work but they might not make any sense either
RaGe
Profile Blog Joined July 2004
Belgium9947 Posts
June 04 2008 15:33 GMT
#7
On June 04 2008 08:39 imDerek wrote:
ok then test null hypothesis: mu1 - mu2 = 0 against the alternative hypothesis: mu1 - mu2 != 0 (!= means not equal to)

yeah tahts Wilcoxon test, consider the first question solved.
Moderatorsometimes I get intimidated by the size of my right testicle
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