Consider the daffodil data of Exercise 11.4.5.
(a) Define a contrast to compare the stem length for daffodils from the open area versus the average of the north, south, east and west sides of the building.
(b) Consider applying a (nondirectional) t test to the contrast is part (a). What is the value of ts and how many degrees of freedom are there?
(c) The P-value for the test is 0.0011. If α = 0.05, state your conclusion regarding the contrast in the context of this setting.