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
how to relate macro economics theories with current indian economy

what happened to the equilibrium price level in Japan during the early 2000s? How did Japan''s equilibrium price level adjust between the middle of 2008 and early 2010?

Q. Determine the Exchange rate? Exchange rate is determined by the ratio of domestic price level to the foreign price level. If, for instance domestic prices increase by 10% wh

Once Y is determined, almost all of the other variables are determined since they are either exogenous or they depend on Y. From Y we can determine C by consumption function, I m

Which of the following statements BEST describes the Metzler paradox? a. Tariffs improve the imposing nation's terms of trade. b. Export subsidies hinder the imposing nation's term

The Price ceiling is the law that sets a maximum price below the equilibrium market price, but a price floor is the law that sets a maximum price above the market equilibrium price

Assume Workers Comp awards $X to workers not working because of injury. $X is set to equal the workers previous wages. Once workers return to work, the award payments stop. Suppose

The mundelfleming model takes the world interst rate r* as anexogenous variable.Let,consider what happen when this variable changes.a,what maight cause the world interest rate tori

Using Simple Keynesian Model, discuss the effect of the following: a) An increase in govt. expenditure. b) A decrease in lump sum taxes. In this context compare the govt.

A company is considering investing in power generation. It wants to setup a 1000 MW power generation system. The company hired you as a consultant to explore different options for