Question

5) On a standardized anagram task (scrambled letters), people successfully complete an average of μ = 26 anagrams with σ = 4. This distribution is normal. A researcher would like to demonstrate that the arousal from anxiety is distracting and will decrease task performance. A sample of n = 14 anxiety-ridden subjects is tested on the task. The average number of anagrams solved is 23.36.

     a) Do the anxiety-ridden subjects show a decrease in task performance? Test with α = .01 for one

          tail.

     b) If a two tailed test with α = .01 is used, what conclusion should be drawn?

Answer 1