6) In which of the following distributions is the probability of a success usually small?
A. Binomial
B. All distribution
C. Poisson
D. Hypergeometric
7) The difference between the sample mean and the population mean is called the
A. Population mean.
B. Sampling error.
C. Population standard deviation.
D. Standard error of the mean.
8) In a simple random sample
A. Every Kth item is selected to be in the sample.
B. Every item has a chance to be in the sample.
C. Every item has the same chance to be in the sample.
D. All of these
9) Suppose a population consisted of 20 items. How many different samples of n = 3 are possible?
A. 6840
B. 120
C. 1140
D. 20
10) Which of the following statements is not a characteristic of the t distribution?
A. It is a continuous distribution.
B. Like z there is only one t distribution.
C. It has a mean of 0.
D. It is symmetrical.
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