Database DB24 (access on line) gives data from pediatric snakebite records. We ask if age makes a difference between being bitten in the hand/arm area versus the foot/leg area by season (seasons 1, 2, 3, 4). (Snakes and children are more active in warm seasons.) Using 4 seasons, m 5 4.

We could perform 4 t tests on age for hand v. foot, one for each season.

(a) Calculate the accumulated p-value over the 4 tests. The p-values for the individual tests are, respective for season, 0.100, 0.279, 0.034, and 0.695. However, an ANOVA on age by the interaction of seasonby-bite-location yields a non-significant p 5 0.069.

(b) Comment on the probability that the significant 0.034 result represents a true positive.

(c) Calculate the Bonferroni critical value and indicate what significance the Bonferroni procedure provides.

(d) Assuming these tests were exploratory, find and explain k’ and the RFDR.