Someone Has Told You That Left-Handed People Have Different Spatial

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Someone has told you that left-handed people have different spatial reasoning abilities than right-handed people. You are skeptical, so you decide to test the idea. You randomly select 15 people from your class and administer a spatial reasoning test to them. A higher score reflects better spatial reasoning. You obtain the following results.
a. State the null hypothesis.
b. State the alternative hypothesis.
c. Assume the data do not allow analysis with the t test.Analyze the data with the most powerful alternative test. What is your conclusion using a = 0.05 2 tail ?