Forum newsfeeds
Forum Newsfeeds


Sites for Teachers

Sites for Teachers


Go Back   UsingEnglish.com ESL Forum > Learning English > Ask a Teacher

Notices

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 11-Jul-2008, 20:40
Newbie
 
Join Date: Oct 2005
Country: Buenos Aires, Argentina
Posts: 11
Current Location: San Fernando, Buenos Aires, Argentina
First Language: Spanish
Member Type: English Teacher
Thanks: 0
Thanked 0 Times in 0 Posts
Viviana C. Ribichich is on a distinguished road
Default Scientific Text



Is this correct?

The null hypothesis implies to assume that the ratios of the taxon frequencies between the different co-ocurrence categories are equal for all the pairs of distribution units.



Cordially,

Viviana

teacher
Reply With Quote
Sponsored Links
  #2 (permalink)  
Old 11-Jul-2008, 21:17
Member
 
Join Date: Nov 2007
Country: Bosnia
Posts: 323
Current Location: the learner's home place here in Bosnia
First Language: serbocroatian
Member Type: Student or Learner
Thanks: 71
Thanked 53 Times in 52 Posts
e2e4 will become famous soon enough
Default Re: Scientific Text

a learner try

Quote:
Originally Posted by Viviana C. Ribichich View Post

Is this correct?

The null hypothesis implies to assume that the ratios of the taxon frequencies between the different co-ocurrence categories are equal for all the pairs of the distribution units.

Cordially,

Viviana

teacher

I haven't heard for the taxon frequencies as to now.
Reply With Quote
  #3 (permalink)  
Old 11-Jul-2008, 21:27
Key Member
 
Join Date: Nov 2007
Country: UK
Posts: 3,319
Current Location: UK
First Language: English
Member Type: Other
Thanks: 3
Thanked 1,200 Times in 1,071 Posts
David L. has much to be proud ofDavid L. has much to be proud ofDavid L. has much to be proud ofDavid L. has much to be proud ofDavid L. has much to be proud ofDavid L. has much to be proud ofDavid L. has much to be proud ofDavid L. has much to be proud ofDavid L. has much to be proud of
Default Re: Scientific Text

You've got (1) ratio of the taxon frequencies , (2) co-ocurrence categories and (3) pairs of distribution units.

I can't see how either (2) or (3) comes into the null hypothesis? Just what statistical test are you performing? 'ratio' means a non-parametric like Binomial, yet you have too many categories, and too many for a Chi-square, so you seem to have a one-factor ANOVA going on with non-continuous data!

Can you tell me more about the data?

Firstly, though, I can mention that a null hypothesis doesn't 'imply' since the null hypothesis is specifically formulated to formally postulate 'no difference', or 'equal means' etc. In effect, with an experiment, you are trying to prove that all sheep are white. This is impossible, since you need to examine all sheep in the Universe, and still be left with doubt in case one is skulking on outer Andromeda somewhere. Hence, the null hypothesis is formulated specifically asserting 'all sheep are black'. You're experiment is then to show your results are so unusual you have found an exception, a 'white sheep', and so you can reject the null in favour of the alternative (experimental) hypothesis.
Reply With Quote
  #4 (permalink)  
Old 11-Jul-2008, 22:46
Member
 
Join Date: Nov 2007
Country: Bosnia
Posts: 323
Current Location: the learner's home place here in Bosnia
First Language: serbocroatian
Member Type: Student or Learner
Thanks: 71
Thanked 53 Times in 52 Posts
e2e4 will become famous soon enough
Default Re: Scientific Text

Quote:
Originally Posted by David L. View Post
You've got (1) ratios(?) of the taxon frequencies, (2) co-ocurrence categories and (3) pairs of distribution units.
I thought NUL hypothesis was about new ways of learning. Sorry.

a learner and not a teacher
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Advanced Text Analysis kko1960 Text Analysis and Statistics 2 22-Feb-2008 23:20
[ESL Weblog] Graded Text Analysis Tdol UsingEnglish.com Content 0 11-Jul-2007 02:00
Major confusion about a text... Noego Ask a Teacher 3 21-May-2007 18:43
Please, could you correct mistakes in my English text? George S Editing & Writing Topics 3 04-May-2006 01:08
text ewelina Ask a Teacher 2 26-Apr-2006 19:20


New To Site? Need Help?

All times are GMT. The time now is 05:49.


vBulletin, Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.2.0
Copyright © 2002 - 2008 UsingEnglish.com