In: Statistics and Probability
A clinical psychology student wanted to determine if there is a significant difference in the Picture Arrangement scores (a subtest of the WAIS-IV that some feel might tap right-brain processing powers) between groups of right- and left-handed college students. The scores were as follows:
Picture Arrangement Scores
Left-Handed students Right- Handed students
12 8
10 10
12 10
14 12
12 11
10 6
8 7
13 9
7 11
(a). Is there a significant difference in the Picture Arrangement scores between the right- and left-handed students? Use α = .05 in making your decision. Be sure to state your hypotheses and include the following, if necessary – test statistic, degrees of freedom, computations, critical value(s)…
(b) What is the 95% confidence interval for the difference between the means?