# Quiz1 - STA3032 Section 7347 Quiz 1 Solutions 1 For the...

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STA3032 Section 7347 Quiz 1 Solutions 1. For the categorical data, what are the numerical summaries used? (b) and (e) : The data in which sample items are placed into categories. Thus, the categorical data is summarized by frequencies and sample proportions for each categories. 2. Suppose that we randomly select five recordings of classical music from the Schwann Record Catalog (which lists all current recordings of classical and nonclassical music), and determine the listening time for each. The data values are x 1 = 37, x 2 = 46, x 3 = 40, x 4 = 57 and x 5 = 50. However, if the fifth recording selected is not a Tchaikovsky symphony but instead a Wagner opera, so that x 5 = 200. Which of the following is true? (c) Mean changes but median remains unchanged : Mean can be highly influenced by the outlier. 3. For a left-skewed distribution: (b) Mean < Median : Mean tends to be drawn in the direction of the tail of a skewed distribution relative to the majority of the observation.

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