5. You form a distribution of the means of all samples of size 9 drawn from an infinite population that is skewed to the left. The population from which the samples are drawn has a mean of 50 and a standard deviation of 12. Which one of the following statements is true of this sampling distribution? (a) µz = 50, ơ, = 12 , the sampling distribution is skewed somewhat to the left. (b) u, = 50, ơ, = 4, the sampling distribution is skewed somewhat to the left. (c) u, = 50, o, =12 , the sampling distribution is approximately normal. (d) µ, = 50, o, = 4 , the sampling distribution is approximately normal.

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