In each of the pairwise comparisons for the Bonferroni Multiple
Comparison method, what are the degrees of freedom for the
t-statistic?A researcher investigated four different word lists for
use in hearing assessments. She wanted to know whether the lists
were equally difficult to understand in the presence of a noisy
background. To find out, she tested 96 subjects with normal
hearing. She randomly assigned 24 to each of the four word lists
and measured the number of words perceived correctly in the
presence of background noise. Here are the summary statistics for
number of words perceived correctly for each of the four words
lists.
Homework Answers
here total sample size N =24+24+24+24 =96
and number of groups =K =4
therefore degree of freedom for the t statistic =N-k =96-4 =92
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