16. The Cost of Lumber, continued The analysis of variance F-test in Exercise 15 (Section 11.2) indicated that there was a difference in the average cost of lumber for the four states. The following information from that exercise is given in the table:

Use Tukey’s method for paired comparisons to determine which means differ significantly from the others at the a 5.01 level.

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Sample Means x,= 262.2 X2=234.8 MSE 41.25 Error df. 16 X =251.6 X-268.6 n: 5 k: 4