Two samples probably will have different means even if they are both the same size and they are both selected from the same population.

True

False

If random samples, each with n = 9 scores, are selected from a normal population with = 80 and = 36, then what is the expected value of the mean of the distribution of sample means?

a.12

b.16

c.4

d.80

A random sample of n = 36 scores is selected from a population. Which of the following distributions will definitively be normal?

a.The scores in the population will form a normal distribution.

b.The distribution of sample means will form a normal distribution.

c.The scores in the sample will form a normal distribution.

d.None of the distributions - the sample, the population, the distribution of sample means - will definitely be normal.

A sample of n = 16 scores is selected from a population with = 70 and = 8. It is very unlikely that the sample mean will be greater than 78.

True

False

A sample of n = 9 scores is randomly selected from a population with = 80 ands= 9. If the sample mean is M = 83, then the corresponding z-score is z = +3.00.

True

False