Design and Analysis of Experiments Assignment #3, due Saturday , 19th March 2022, 23h59
Factorial Design in Blocks
1. Go to library ¡±daewr¡±. Download the data ¡±bha¡±. This data set is from the experiment conducted by Festing (2003) to deter- mine whether BHA (a common antioxidant used in processed foods) induced activity of the liver enzyme EROD in mice and whether this activity was in- dependent of the strain of mice. It was part of a larger study to deter- mine if antioxidants help protect against cancer. Print the data file. (4 points).
2. Find the data description stored in R. (4 points)
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3. a. How many factors are there in total?(1 point)
b. How many levels of each factor are there?(1 point)
c. Can you consider the design in data set ¡±bha¡± a complete block design? Why?(2 points)
4. Give the appropriate model to analyse this design. (2 points)
5. Perform statistical analysis of the data and give the R-output. (6 points)
6. Interpret the factor and interaction effects.(4 points)
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