Question

The distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4 inches. A random sample of 36 adult males is selected. Describe the sampling distribution.

	a.	Since the sample size is greater than 30, the sampling distribution is approximately normal with a sample mean of 69 inches and a sample standard deviation of 9 inches.
	b.	Since the sample size is greater than 30, the sampling distribution is approximately normal with a sample mean of 69 inches and a sample standard deviation of 0.667 inches.
	c.	Since the sample size is greater than 30, the sampling distribution is approximately skewed to the right with a sample mean of 69 inches and a sample standard deviation of 9 inches.
	d.	Since the sample size is greater than 30, the sampling distribution is approximately skewed to the left with a sample mean of 69 inches and a sample standard deviation of 0.667 inches.

Which of the following correctly describes a continuous random variable?

	a.	We cannot list all of the possible values of a continuous random variable.
	b.	We cannot list all of the probabilities for each one of the infinite number of conceivable values of the variable.
	c.	We commonly associate probabilities with ranges of values along the continuum of possible values that the random variable might take on.
	d.	All of the above.

Answer 1