1) Josh earned a 75% on his statistics exam. His professor announces that the me

Question

1) Josh earned a 75% on his statistics exam. His professor announces that the mean score was 85% and the standard deviation was 5%. What is Josh's z-score?

2) When conducting post-hoc multiple comparisons, why is the Bonferroni correction method often preferred to the LSD method?

a) The LSD method is much more complicated and much more difficult to interpret.

b) The Bonferroni method makes it easier to detect differences between groups.

c) The Bonferroni method controls for Type I error.

d) The Bonferroni method controls for Type II error.

Explanation / Answer

1. Josj z - score

= (X - Mean) / SD

= (75 - 85) / 5

= - 10/5

= -2

Hence,

Josh's z - score will be -2.

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