1) Which level of measurement is required for the mode?
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?
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?
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?
10) Which of the following statements is not a characteristic of the t distribution?
A. Like z there is only one t distribution.
11) We wish to develop a confidence interval for the population mean. The shape of the population is not known, but we have a sample of 40 observations. We decide to use the 92% level of confidence. The appropriate value of z is:
12) We wish to develop a confidence interval for the population mean. The population follows the normal distribution, the standard deviation of the population is 3, and we have a sample of 10 observations. We decide to use the 90% level of confidence. The appropriate value of to represent the level of confidence is
D. z =1.65
13) We use the General Rule of Multiplication to combine
D. Events that are not independent.
14) Which of the following is not a type of probability?
15) Events are independent if
A. The probability of one event happening does not affect the probability of another event happening.