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
The Pigou effect: A) suggests that as prices fall and real money balances rise, consumers should feel less wealthy and spend less. B) suggests that as prices fall and real mo

In your own words, explain the following: a) affective aperture, b) array factor, c) Friis equation, d) Antenna H-plane and E-plane, e) radiation resistance

Q. What do you mean by Capital Flows? With free capital flows, this is a very unreasonable assumption. If we domestic interest rate increase against the foreign interest rates,

What is the formula for consumer price index?

what is the company lidted in NASDAQ that is included in the dow jones industrial average

different between money multplier vs credit multplier ?

Using the PPC show what is meant by the law of increasing opportunity cost and explain (state) why that law exists. Why is that law important when deciding whether or not to watch



Read "How Did Economists Get It So Wrong" by Paul Krugman and second, the blog "History of Economics Playground", by Pedro Duarte, Tiago Mata, Clement Levallois, Yann Grd...etc., t