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Is there a difference in the hourly earnings of left-handed and right-handed males? A researcher obtained a random sample of 1200 right-handed males and found the mean hourly earnings to be $13.20. A random sample of 230 left-handed males resulted in mean hourly earnings of $13.45. Does the sample evidence suggest that there is a difference in the hourly earnings of right-handed versus left-handed males? up (a) What is the explanatory variable in this study? Is it qualitative or quantitative? (b) What is the response variable in this study? Is it qualitative or quantitative? (c) What type of analysis could be used to determine if there is a difference in the hourly earnings of left-handed and right-handed males? Choose from among the following: (1) Hypothesis test for one proportion (2) Hypothesis test for one mean (3) Hypothesis test for two independent proportions (4) Hypothesis test for two dependent means (5) Hypothesis test for two independent means (d) Suppose the analysis results in a P-value of 0.23. Interpret the P-value and write a conclusion for the study. BIUSI E X X Insert Formula