1. Newbie
Join Date
Oct 2005
Posts
11

## 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

2. Senior Member
Join Date
Nov 2007
Posts
844

## Re: Scientific Text

a learner try

Originally Posted by Viviana C. Ribichich

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.

3. VIP Member
Join Date
Nov 2007
Posts
5,425

## 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.

4. Senior Member
Join Date
Nov 2007
Posts
844

## Re: Scientific Text

Originally Posted by David L.
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

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•

Search Engine Optimization by vBSEO 3.6.1