Abbie wants to determine whether handedness affects scores on the Picture Arrangement subtest of the WAIS...

Abbie wants to determine whether handedness affects scores on the Picture Arrangement subtest of the WAIS III, as this test is suggested to tap right-brain processing powers. Abbie gives the test to a group of right-handers and a group of left-handers; their scores are below:

Left-handed: 12, 10, 12, 14, 12, 10, 8 Right-handed: 8, 10, 10, 12, 11, 6, 7, 5, 9, 8

Test Abbie’s hypothesis that left-handed participants have superior Picture Arrangement scores compared to right-handers; with an alpha of .01.

a. State the H₀ and H₁ hypotheses, in statistical notation, and identify the critical t value(s).

b. Calculate standard error and the observed t-statistic. What is your decision regarding the null hypothesis? Why?

c. State your results in nonstatistical terms.

Expert Solution

Let denote the mean superior Picture Arrangement scores for left handed and right handed people respectively.

Conclusion in context of problem :

There is not sufficient evidence to support the claim that handedness affects scores on the Picture Arrangement subtest of the WAIS III.

orchestra answered 2 years ago

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