The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper has mean 320 inches and standard deviation 30 inches. Suppose that the results for 100 consecutive Mondays can be regarded as a random sample and let denote the mean number of column inches of classified advertisements in the sample. Assuming a sample of 100 is sufficiently large, the random variable has
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The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper has mean 320 inches and standard deviation 30 inches. Suppose that the results for 100 consecutive Mondays can be regarded as a random sample and let    denote the mean number of column inches of classified advertisements in the sample. Assuming a sample of 100 is sufficiently large, the random variable    has 
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a sampling distribution that has a larger spread than the population distribution because the sample size of 100 is sufficiently large.

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a sampling distribution that has a standard deviation of 3 inches.

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a sampling distribution that is approximately Normal by the central limit theorem.

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a sampling distribution that has a mean of 320 inches.

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