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Consider two populations for which " 1 1 = 32, 01 = 2, My = 29, and o, = 4. Suppose that two independent random samples of sizes n, = 49 and n, = 51 are selected. Describe the approximate sampling distribution of x, - x, (center, variability, and shape). What is the shape of the distribution? O The distribution would be non-normal. O The distribution is approximately normal. O The shape cannot be determined. What is the mean of the distribution? What is the standard deviation of the distribution? (Round your answer to three decimal places.)