For the data file, go to the R and type in >install.packages(alr4). data name: wm2 Give me the R and the step by the step solution.

(a) Obtain an appropriate graphical summary of the data.

(b) Fit the four mean functions (coincident mean function, parallel mean functions, co-incident at zero, and general) using Bin as a categorical variable with 16 levels.

i. Why would it not make sense to treat Bin as a quantitative variable?

ii. How many parameters are in each of the mean functions?

iii. Is the coincident at zero mean function a sensible model for these data? Explain.

iv. Which pairs of models can be tested against each other? Conduct all possibletests. v. Which mean function would you use to assess the viability of the candidate site for building a windmill farm?