Consider two populations for which H, = 32, o, = 2, u2= 27, and 3. Suppose that two independent random samples of sizes n, = 48 and n2 = 57 are selected. Describe the approximate sampling distribution of ?x -'x (center, variability, and shape). What is the shape of the distribution? (letter only) a. The distribution would be non-normal. b. The distribution is approximately normal. c. 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.)

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