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1) Which level of measurement is required for the median?
A. Nominal
B. Ratio
C. Ordinal
D. Interval
2) Which level of measurement is required for the mode?
A. Nominal
B. Ratio
C. Ordinal
D. Interval
3) The weighted mean is a special case of the:
A. Mean
B. Geometric mean
C. Median
D. Mode
4) Which of the following is not a requirement of a probability distribution?
A. Equally likely probability of a success.
B. The probability of each outcome is between 0 and 1.
C. Sum of the possible outcomes is 1.00.
D. The outcomes are mutually exclusive.
5) Which of the following is not a requirement of a binomial distribution?
A. A constant probability of success.
B. Equally likely outcomes.
C. Only two possible outcomes.
D. A fixed number of trails.
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.
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:
A. 1.96
B. 1.75
C. 1.65
D. 2.58
12) A point estimate is
A. Always an estimate of the population mean.
B. Always equal to the population value.
C. An estimate of the population parameter.
D. None of these
) Which of the following is a correct statement about a probability?
A. It may range from 0 to 1.
B. It cannot be reported to more than 1 decimal place.
C. It may assume negative values.
D. It may be greater than 1.
14) Which of the following is not a type of probability?
A. Subjective
B. Relative frequency
C. Classical
D. Independent
15) An experiment is a:
A. Collection of events
B. Always greater than 1.
C. The act of taking a measurement or the observation of some activity.
D. Collection of outcomes.
16) A nominal scale variable is
A. Usually the result of counting something.
B. May assume negative values.
C. Cannot have more than two categories.
D. Has a meaningful zero point.
17) The ratio scale of measurement
A. Usually involves ranking.
B. Has a meaningful zero point.
C. Is usually based on counting.
D. Cannot assume negative values.
18) Which of the following statements is true regarding a sample?
A. It is a part of population.
B. It must contain at least five observations.
C. It refers to descriptive statistics
D. All of these are correct
19) Which of the following is a requirement for a two-sample test of proportions.
A. The population standard deviations are equal.
B. Both samples are at least 30.
C. nB and n(1-B) are both greater than 5.
D. Both populations are positively skewed.
20) The alternate hypothesis
A. Is accepted if the null hypothesis is rejected.
B. Tells the value of the sample mean.
C. None of these
D. Will always contain the equal sign.
21) A Type I error is
A. The correct decision
B. A value determined from the test statistic
C. Accepting the null hypothesis when it is false.
D. Rejecting the null hypothesis when it is true
22) To conduct a nonparametric test the.
A. Population must follow the normal distribution.
B. The standard deviation must be known.
C. The data must be at least interval scale.
D. It is not necessary to make any assumption about the shape of the population.
23) Which of the following is not a characteristic of the X2
A. Its shape is based on the sample size.
B. It is not negative.
C. It approaches a normal distribution as the degrees of freedom increase.
D. It is positively skewed.
24) In a contingency table
A. The number of rows must be the same as the number of columns.
B. A variable is classified according to two criteria.
C. There must be at least 10 observations in each cell.
D. All of these
25) A dummy variable or indicator variable
A. May assume only a value of 0 or 1.
B. Is another term for the dependent variable.
C. Is equal to Y
D. Is found by (Y - Y).
26) In the ANOVA table the value of k is
A. The number of independent variables.
B. The total number of observations
C. The sum of squares total.
D. The number of degrees of freedom.
27) In a multiple regression equation
A. There is only one dependent variable.
B. The R2 term must be at least .50.
C. All the regression coefficient must be between -1.00 and 1.00.
D. None of these
