Two-way anova., Macroeconomics

A scientist has been studying the organisms colonising the pilings underneath a wharf in Sydney Harbour. He postulates two factors might make these communities of sponges, worms, anemones, starfish and other marine creatures different from what would be found on a natural rocky reef in these areas. One factor is the shade provided by the wharf. The other factor is the distance from the bottom. He designs an experiment to test the importance of these factors on these communities with the following factors and design:

Factor 1: Position, 2 levels (near (N) vs far (F) from the sea floor), fixed

Factor 2: Shade, 3 levels (open (O), shaded by opaque plexiglass (S) and a procedural control

(C), consisting of clear plexiglass), fixed

He measured the community diversity, using the Shannon diversity index (unitless), on each of n = 4 replicate surfaces per combination of the above two factors. The Shannon index (the response variable here) is defined as: pi log pi, where pi is the proportional abundance of the ith species in the community. Data are found in the file "Shannon.txt".

a. Analyse the data using a two-way ANOVA. Be sure to check the assumptions.

b. Given the ANOVA results, do appropriate pair-wise comparisons, using Tukey's HSD tests.

c. Summarise the results and give conclusions regarding the effects of these factors on the diversity of communities as measured by the Shannon index.

Posted Date: 2/26/2013 1:38:53 AM | Location : United States







Related Discussions:- Two-way anova., Assignment Help, Ask Question on Two-way anova., Get Answer, Expert's Help, Two-way anova. Discussions

Write discussion on Two-way anova.
Your posts are moderated
Related Questions
Compared with the situation before 1981, the marginal tax rates imposed on individuals and families with high incomes are now lower. What was the top marginal personal income tax r

THE PRODUCT MARKET Z=C+I+G C=a+bYd I=Io+I1Y-I2i Equilibrium condition, Y=Z, where Y represents output and Z is aggregate spending. THE FINANCIAL MARKET Md=MT+Mp MT=MTo+MT1Y Mp=Mpo

Foreign exchange risk is the level of uncertainty that a company must handle for changes in foreign exchange rates that will unfavourably affect the money the company receives for

The graph shows that if policymakers respond immediately to an oil price shock by stimulating aggregate demand, shifting AD to AD* then the level of output will remain constant. Th

ALL SELLERS MAY BE TEMPTED TO RAISE THE PRICE OF WHAT THEY SELL, BUT A NEGATIVE UNINTENDED EFFECT OF RAISING THE PRIE COULD BE______ IN UNITS SOLD LARGE ENOUGH TO _____THEIR TOTAL

As people went from barter societies to more advanced economies, money had to be invented. Several things successively served as money in the course of economic evolution. Arrowhea

Long Run Equilibrium:Graphical Analysis In the long run the natural rate of output is the level of output to which the economy will tend to adjust in the long run. This indicat

A local movie theater wants to know how much popcorn they should stock for a given movie showing. Records from 94 movies reveal a mean of 57 boxes and a standard deviation of 17.8.

If a firm wants to sell goods more often, would they prefer to produce a high quality good that will not wear out or one that will wear out faster. For example, what is the 'life e