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Unformatted text preview: 8 ounces per week? (a) 60% (b) 20% (c) 40% (d) 80% (e) 50% 4. Refer to the previous question. Problem drinkers will be classiﬁed as those in the upper 10% of consumption. What is the approximate lower bound for the consumption of problem drinkers? (a) 15 oz (b) 18 oz (c) 17 oz (d) 10% (e) 90% 5. An instructor decides to “curve grades” in a course depending upon the percentile measures. Here are some summary statistics: Quantiles minimum 10.0% 25.0% median 75.0% 90.0% maximum final mark 10 48 55 66 78 87 93 Which of the following is FALSE ? (a) About 1/4 of the class received a score of 55 or less. (b) About 3/4 of the class received a score of 75% or less. (c) About 50% of the class received grades between 55 and 78. (d) This method assigns grades relative to how others do in a class rather than against an absolute standard. (e) This method always has half of the class at or above the median grade. c ± 2006 Carl James Schwarz 2...
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- Summer '11
- Quartile, Quantile, Decile