Nested and split-plot designs, Science

1. How much variation is there in the routine analysis of fibre content of soya cotton cakes? The data are presented by the lab that did the test and the technician within the lab that did the analysis.

(Data from Clarke and Kempson)

To perform an appropriate analysis, you will need 3 columns, one for the responses, one indicating the lab and one indicating the technician. When specifying your model, remember that technicians are nested within labs (so you could number the technicians from 1 to 9 if you wanted). Write down the two null hypotheses. Check whether or not the assumption of normality is justified. Give a 2 or 3 sentence summary of your conclusions.

1907_table1.png

2. Commercial respirators include filters to protect against particulate matter. There are two manufacturers of such filters and three filters were selected at random from each manufacturer. Each filter was tested three times. \The measurements are the percent penetration by a standard type of aerosol." (from Kuehl, including data)

300_table2.png

(a) Using these data , write down the appropriate linear model.

(b) Compute the analysis of variance table, including the expected mean squares.

(c) Check for normality.

(d) As the assumption of normality is not satisfied, replace the responses by their ranks and repeat

the analysis on the ranks. Have your conclusions changed?

(e) Write a 1 or 2 sentence summary of your conclusions.

3. Montgomery (2007) describes an experiment to study pigment dispersion in paint. Four mixes of a pigment are used. Each day all four mixes are prepared and then applied to three panels with each panel receiving paint by one of three application methods (brush, roller, spray gun). The experiment is repeated on a second day. Perform an appropriate analysis and comment. (Hint: consider the paper tensile strength example.)

246_table3.png

Posted Date: 2/19/2013 5:02:47 AM | Location : United States







Related Discussions:- Nested and split-plot designs, Assignment Help, Ask Question on Nested and split-plot designs, Get Answer, Expert's Help, Nested and split-plot designs Discussions

Write discussion on Nested and split-plot designs
Your posts are moderated
Related Questions
A floating experiment with different kinds of wood Secure a cork, and pieces of wood like as maple, mahogany and ebony. Place them in a pan of water and notice how every one be

I have a vocabulary quiz tommorrow! WHat am I supposed to do

discuss the special conflict that erikson believed marked young adulthood. Then describe how an individual could best resolve this conflict

where did people come from

Explain the acid/base balance of our blood changes This acid/base balance of our blood changes in response to many things. These include: Diet: the diets that are rich in

Surgery: Susruta-Samhita,  a.major  treatise on surgery, was derived not only from exhaustive observation of symptoms of diseases  and their possible treatments but also a fair

write an essay about electrical energy conservation

is perkin''s condensation possible in aliphatic aldehyde?

Define the term Amplitude In simpler terms, amplitude is the amount or relative value of a signal. Amplitude is measured in units of pressure e.g. Newtons/sq. m. But what is ph

hi can you help me on my science