Suppose a Sample of N = 50 Items Is Drawn

question 125

Multiple Choice

Suppose a sample of n = 50 items is drawn from a population of manufactured products and the weight, X, of each item is recorded. Prior experience has shown that the weight has a probability distribution with μ = 6 ounces and σ= 2.5 ounces. Which of the following is true about the sampling distribution of the sample mean if a sample of size 15 is selected?

• A) The mean of the sampling distribution is 6 ounces.
• B) The standard deviation of the sampling distribution is 2.5 ounces.
• C) The shape of the sample distribution is approximately normal.
• D) All of the above are correct.

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