hw1_sol - Stat 528 - Homework 1 Solutions 1.2 The...

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Stat 528 - Homework 1 Solutions 1.2 The individuals of the set of data are the students: Advani, Barton, etc. The data contain the values of students, major, points and grade. So the variables are Major, Points and Grade. Major is categorical. Points is quantitative. Grade is categorical. 1.10 Since the proportions of dishwashers that need a service call for each brand are different and comparable, we could use the proportion to measure its reliability. 2942 / 13376 = 0.219, about 22% of Brand A dishwashers needed a service call, while 192 / 480 = 0.4 , 40% of Brand B dishwashers did. 1.18 The overall shape is skewed to the right with the center around 4. This means that there are more short words (3-4 letters) than quite long words (>10 letters) in Shakespeare’s plays. We would expect the distribution of other authors to be similar, because short words, such as “the”, “is”, “as” and “you”, etc, are common. 1.24
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This note was uploaded on 07/26/2011 for the course STA 528 taught by Professor Calder during the Winter '09 term at Ohio State.

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hw1_sol - Stat 528 - Homework 1 Solutions 1.2 The...

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