A completely randomized design o f an analysis o f variance experim ent produced a portion o f the following ANOVA table.

SUMMARY Groups Count Average Column 1 10 349 Column 2 10 348 Column 3 10 366 Column 4 10 365 ANOVA Source o f Variation SS d f MS F p-value F crit Between Groups 2997.11 3 999.04 15.54 1.2E-06 2.866 Within Groups 2314.71 36 64.30 Total 5311.82 39

a. Use Fisher's LSD test to determ ine which means differ at the 5% level o f significance.

b. Use Tukey's HSD test to determ ine which means differ at the 5% level o f significance.

c. Given your responses to parts a and

b, do the population means differ at the 5% significance level? P-69