APPLIED BUSINESS RESEARCH AND STATISTICS QUESTIONS AND ANSWERS

UNIVERSITY OF PHOENIX

1) Which of the following measures of central location is affected most by extreme values? A. Mean B. Median C. Mode D. Geometric mean 2) A correlation matrix… A. Shows all simple coefficients of correlation between variables B. shows only correlations that are zero C. shoes the correlations that are positive D. 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. Median C. Mode D. Geometric mean 4) Which level of measurement is required for the median? A. Nominal B. Ordinal C. Interval D. Ratio

5) The mean and the variance are equal in… A. the normal distribution B. the binomial distribution C. the Poisson distribution D. the hypergeometric distribution 6) The difference between the sample mean and the population mean is called the… A. margin of error B. population standard deviation C. standard error of the mean D. sampling error 7) 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 a quantitative variable D. is a variable at a ratio or interval level of measurement 8) A Type I error is… A. the correct decision B. a value determined from the test statistic C. rejecting the null hypothesis when it is true D. accepting the null hypothesis when it is false 9) Which level of measurement is required for the mode? A. Nominal B. Ordinal C. Interval D. Ratio 10) The weighted mean is a special case of what? A. Mean B. Median C. Mode D. Geometric mean 11) We use the general rule of multiplication to combine… A. events that are not independent B. mutually exclusive events C. events that total more than 1.00 D. events based on subjective probabilities

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