CB2200 Business Statistics Quiz Topic 1.doc

CB2200 Business Statistics Quiz Topic 1.doc - CB2200...

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CB2200 Business Statistics Quiz Topic 1 & 2 30 September – 1 October 2017 1. The median for a list of six pulse rates 70, 64, 80, 74, 92, 74 is A. 74 B. 76 C. 80 D. 77 2. The mean of a distribution is 23, the median is 24, and the mode is 25.5. It is most likely that this distribution is A. Left-skewed B. Random C. Right-skewed D. Symmetrical 3. The sum of the deviations from the mean is A. The standard deviation B. Positive C. The range D. Zero 4. In statistics, a population consists of A. None of these B. All subjects or objects whose characteristics are being studied C. All people living in a country D. All people living in the area under study 5. Consider seven distinct population observations in an ordered array below: a < b < c < d < e < f < g Which of the following statements are true? I. The mean is d II. The median is d III. The range is g-a IV. If g-f > b-a, then the distribution is right-skewed A. I, II and III B. III and IV C. I and II D. II, III and IV
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6. A survey asked people how often they exceed speed limits. The data are then
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