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
Temperature variations in glacial regions In glacial regions of the world or during forest fires the rocks are exposed to extreme temperatures. Since the conduction of heat is

Explain Activation of enzyme - Functions of Bile Activation of enzyme: Bile salts activate pancreatic lipase. Lipase, as you already know, is a fat - splitting enzyme and split

classification of various qualitative & quantitative health management technologies


Explain the Menstrual Phase - Menstrual Cycle If the ovum is not fertilized, a high level of progesterone in the blood inhibits the activity of pituitary gland and the producti

State the Pipette Method of soil The   sieve analysis, though is a true particle size analysis, is  unable to separate particles smaller than 20 microns. Such particles are sep

Question: "Sociology Considered as a Scientific Discipline" Discuss the this statement with the relevant Examples Answer Sociology is the systematic study of Society. Soci

QUESTION a) Is Psychology a science? Explain with an appropriate definition b) How does the knowledge of psychology help you deal with people in your everyday life? c) Desc

What is genetics>

Starch  is not  soluble  in  water  ?? It forms colloid  in  aqueous medium  called  as micelles.  Iodine reacts with both amylose and amylopectin, but the former produces a co