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1) Which level of measurement is required for the mode?
B.
Nominal
2) A difference between calculating the sample mean and the population mean is:
B.
Only in the symbols, we use instead of µ and n instead of N.
3) Which level of measurement is required for the median?
D.
Ordinal
4) The mean and the variance are equal in
C.
The Poisson distribution.
5) Which of the following is not a requirement of a probability distribution?
B.
Equally likely probability of a success.
6) In which of the following distributions is the probability of a success usually small?
B.
Poisson
7) The difference between the sample mean and the population mean is called the
A.
Sampling error.
8) In a simple random sample
C.
Every item has the same chance to be in the sample.
9) Suppose a population consisted of 20 items. How many different samples of n = 3
are possible?
B.
1140
10) Which of the following statements is not a characteristic of the t distribution?
A.
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 Spring '07
 Hutchings
 Calculus

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