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In: Statistics and Probability

A clinical psychology student wanted to determine if there is a significant difference in the Picture...

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?

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