Apply the modified Tukey’s method to the data in Exercise 22 to identify significant dif...

Apply the modified Tukey’s method to the data in Exercise 22 to identify significant differences among the μ_i’ s.

Reference exercise 22

The following data refers to yield of tomatoes (kg/plot) for four different levels of salinity. Salinity level here refers to electrical conductivity (EC), where the chosen levels were EC = 1.6, 3.8, 6.0, and 10.2 nmhos/cm.

Use the F test at level α = .05to test for any differences in true average yield due to the different salinity levels.