# Qnt351 Final Exam Essay

1071 words - 4 pages

1) The main purpose of descriptive statistics is to A. summarize data in a useful and informative manner B. make inferences about a population C. determine if the data adequately represents the population D. gather or collect data 2) The general process of gathering, organizing, summarizing, analyzing, and interpreting data is called A. statistics B. descriptive statistics C. inferential statistics D. levels of measurement 3) The performance of personal and business investments is measured as a percentage, return on investment. What type of variable is return on investment? A. Qualitative B. Continuous C. Attribute D. Discrete 4) What type of variable is the number of robberies reported in your city? A. Attribute B. Continuous C. Discrete D. Qualitative 5) What level of measurement is the number of auto accidents reported in a given month? A. Nominal B. Ordinal C. Interval D. Ratio 6) The names of the positions in a corporation, such as chief operating officer or controller, are examples of what level of measurement? A. Nominal B. Ordinal C. Interval D. Ratio 7) Shoe sizes, such as 7B, 10D, and 12EEE, are examples of what level of measurement? A. Nominal B. Ordinal C. Interval D. Ratio 8) Monthly commissions of first-year insurance brokers are \$1,270, \$1,310, \$1,680, \$1,380, \$1,410, \$1,570, \$1,180, and \$1,420. These figures are referred to as A. a histogram B. raw data C. frequency distribution D. frequency polygon 9) A small sample of computer operators shows monthly incomes of \$1,950, \$1,775, \$2,060, \$1,840, \$1,795, \$1,890, \$1,925, and \$1,810. What are these ungrouped numbers called? A. Histogram B. Class limits C. Class frequencies D. Raw data 10) The sum of the deviations of each data value from this measure of central location will always be 0. A. Mode B. Mean C. Median D. Standard deviation 11) For any data set, which measures of central location have only one value? A. Mode and median B. Mode and mean C. Mode and standard deviation D. Mean and median 12) A sample of single persons receiving social security payments revealed these monthly benefits: \$826, \$699, \$1,087, \$880, \$839, and \$965. How many observations are below the median? A. 0 B. 1 C. 2 D. 3 13) A dot plot shows A. the general shape of a distribution B. the mean, median, and mode C. the relationship between two variables D. the interquartile range 14) The test scores for a class of 147 students are computed. What is the location of the test score associated with the third quartile? A. 111 B. 37 C. 74 D. 75% 15) The National Center for Health Statistics reported that of every 883 deaths in recent years, 24 resulted from an automobile accident, 182 from cancer, and 333 from heart disease. Using the relative frequency approach, what is the probability that a particular death is due to an automobile accident? A. 24/883 or 0.027 B. 539/883 or 0.610 C. 24/333 or 0.072 D. 182/883 or 0.206 16) If two events A and B are mutually exclusive, what does the special rule of addition state? A....

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