One of the disadvantages of Fisher's LSD method is that the probability of committing a _____________________________________________________________.
A) Type II error increases as the number of pairwise comparisons increases
B) Type I error increases as the number of pairwise comparisons decreases
C) Type II error increases as the number of pairwise comparisons decreases
D) Type I error increases as the number of pairwise comparisons increases

Question

Quizplus · Accepted Answer

Fisher's LSD method involves making multiple pairwise comparisons between means, and each comparison has a certain probability of committing a Type I error, which is the chance of mistakenly rejecting the null hypothesis when it is actually true. As the number of pairwise comparisons increases, the overall chance of committing a Type I error (also known as the family-wise error rate) accumulates and becomes more likely. Therefore, the disadvantage of Fisher's LSD method is that the probability of committing a Type I error increases as the number of pairwise comparisons increases.

One of the Disadvantages of Fisher's LSD Method Is That