hw2 - Daniela Sorokko ILRST 212 9/7/06 HW # 2 Chapter 4...

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Daniela Sorokko ILRST 212 9/7/06 HW # 2 Chapter 4 Thinking about Shape a) I think the distribution would be unimodal and skewed because most students probably don’t have too many traffic tickets either because no one likes to receive and pay tickets or because they may not have cars on campus. But, there’s probably a fraction of students who receive a larger amount of tickets, thus skewing the distribution. b) The distribution will probably be unimodal and skewed to the right because most players at that level will have roughly equal games but a few not be playing their best game and may diverge from the mean. c) The distribution of weights of female babies in a particular hospital will most likely be symmetric and unimodal because most babies will be born at roughly equal weights, with some slightly more or less than the mean. d) The distribution will most likely be bimodal and skewed to the right because boys tend to have short hair but the average length of girls’ hair is longer and the length of hair can be unlimited in the positive direction. Singers a) The distribution is bimodal because there’s two humps and more or less symmetrical. b) The reason for the bimodal distribution may be that the chorus consists of both men and women, and since men tend to be taller on average than women, there are two modes. Hurricanes (15) b) The distribution is unimodal and skewed to the right. The center is around 2 hurricanes. There don’t seem to be any outliers. And the data ranges between 0 and 7 hurricanes. Hurricanes (16)
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The distribution in the years between 1944 and 1979 is similar to the distribution in the previous problem. It is unimodal and skewed to the right, with the center around 2 and the data ranging between 0 and 7. The values of 5 and 6 may be outliers in this distribution, however, because they occur far from the center and are very infrequent. The distribution for the hurricanes between 1970 and 2000 also have a unimodal distribution that is skewed to the right but the center is around 1 and the data ranges between 0 and 6. Acid Rain The distribution seems to be unimodal and skewed to the right, with a center around 4.4 Chapter 5 Sick Days The data that both the company and the union negotiator are using is most likely skewed because the median and mean are very far from each other. The company may be using the mean to calculate the average number of sick days missed, thereby taking every value
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This note was uploaded on 09/28/2008 for the course ILRST 2120 taught by Professor Vellemanp during the Fall '06 term at Cornell University (Engineering School).

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hw2 - Daniela Sorokko ILRST 212 9/7/06 HW # 2 Chapter 4...

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