Refer to Exercise 14.23.
a. Use Tukey€™s W procedure to determine differences in mean increases in trunk diameter among the three calcium rates. Use α = .05.
b. Are your conclusions about the differences in mean increases in diameter among the three calcium rates the same for all four pH values?
In exercise

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Calcium pH Value 100 2300 6.3 52 74 5.9 7.0 6.7 6.3 7.66.1 7.1 74 73 74 7.3 75 7.5 7.1 7.2 7.6 7.6 7.2 7.2 7.5 74 7.87.0 72 74 7.5 7.066 7.2 6.9 4.0 n5.0 6.0 7.3 7.0 6.4