QNT 561 Final Exam

1) Which of the following measures of central location is affected most by extreme values? A. MeanB. MedianC. Mode D. Geometric mean

2) A correlation matrix…A.Shows all simple coefficients of correlation between variablesB. shows only correlations that are zeroC. shoes the correlations that are positiveD. shows only the correlations that are statistically significant

3) In a set of observations, which measure of central tendency reports the value that occurs most often? A. Mean B. MedianC. ModeD. Geometric mean

4) Which level of measurement is required for the median? A. Nominal B. OrdinalC. IntervalD. Ratio

5) The mean and the variance are equal in…A. the normal distributionB. the binomial distributionC. the Poisson distributionD. the hypergeometric distribution

6) The difference between the sample mean and the population mean is called the…A. margin of errorB. population standard deviationC. standard error of the meanD. sampling error

7) A dummy variable or indicator variable… A. may assume only a value of 0 or 1B. is another term for the dependent variableC. is a quantitative variableD. is a variable at a ratio or interval level of measurement

8) A Type I error is…A. the correct decisionB. a value determined from the test statisticC. rejecting the null hypothesis when it is trueD. accepting the null hypothesis when it is false

9) Which level of measurement is required for the mode? A. Nominal B. OrdinalC. IntervalD. Ratio

10) The weighted mean is a special case of what? A. Mean B. MedianC. ModeD. Geometric mean

11) We use the general rule of multiplication to combine…A. events that are not independentB. mutually exclusive eventsC. events that total more than 1.00D. events based on subjective probabilities

12) A local trade union consists of plumbers and electricians. Classified according to rank: Apprentice Journeyman Master TotalPlumbers