When using Fisher's LSD method at some stated significance level,the probability of committing a Type I error increases as the number of _________________________.
A) pairwise comparisons decreases
B) pairwise comparisons increases
C) sample size increases
D) treatments decreases

Question

Quizplus · Accepted Answer

The Fisher's LSD method involves multiple pairwise comparisons, and as the number of pairwise comparisons increases, the probability of committing a Type I error also increases. This is because with more comparisons, there is a higher chance of at least one comparison showing a significant difference by chance alone. Therefore, as the number of pairwise comparisons increases, the significance level should be adjusted accordingly to control the overall Type I error rate.

When Using Fisher's LSD Method at Some Stated Significance Level,the