Originally Posted by

**sylver**
So the suggestion here would be in using the ANOVA test use it to compare say urban Species richness/abundance against width, tree species etc then do the same for park species abundance/richness to see if any of the variables are having an effect upon the spp richness/abundance. Then to compare the species richness/abundance of the parkland v.s the species richness/abundance of the urban trees i merely do the one way ANOVA comparing the spp rich urban v.s parkland then the same for abundance?

If you want to know if being a street tree or an urban park tree affects your species abundance you use the ANOVA test. (think of species abundance as your dependent variable and the site as being the independent variable) The ANOVA test will tell you if the mean abundance is significantly different between the locations. You can compare any of your continuous variables to the site at which the measurements were taken using this test, so tree width vs site but probably not tree type vs site. (i just realised i'm assuming species richness/abundance are continuous variables?)

If you want to compare two, or more, continuous variables you need to formulate a linear model, this is a little more involved but i'm sure the statistics package will do it for you and tell you if a particular variable is of significant influence on the output variable. (this is probably best illustrated by example so if this is what you're interested in doing then just give an example) Comparing a continuous variable with multiple continuous and categorical variables can also be done, but again it is a little more involved.

Sorry if this is really vague, there's just a large body of theory behind what tests to use and when.

Originally Posted by

**geeknick**
Statistics is one of the toughest concepts of mathematics and we try best to make it simple for you. I didn't clear these topic. will you please help me in the areas listed below:

- Mean
- Median
- Mode
- Range
- Probability

My examinations dates are near so i afraid of statistics so please provide me some statistics help when you will reply i will keep post my questions and my doubts regarding statistics..

Welcome to the forum geeknick. From the topics you listed i'd say

these videos will be of interest to you, the explanations are quite clear and simple. If you have any further questions though you might want to post them in a new thread within the mathematics forum.