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On a standardized spatial skills task, normative data reveal that people typically, get µ= 15 correct solutions. A psychologist tests n = 7 individuals who have brain injuries in the right cerebral hemisphere. For the following data, determine whether or not right-hemisphere damage results in significantly reduced performance on the spatial skills task. Test with alpha set at .05 with one tail. The data are as follows:
12, 16, 9, 8, 10, 17, 10