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Owner: mdaffner
Created: Feb 1, 2018
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#37 Cholesterol Levels Smokers vs Ex-Smokers
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When compared to one another with the sample data given Ex-Smokers were found to have a lower Cholesterol levels than Smokers. At means of approximately 233 versus 237 respectively, the difference was not very large. However the Median Cholesterol level of Ex-Smokers was 238 meanwhile the median Cholesterol level of Smokers was 230. These differences between mean and median indicate that the Ex-smoker data was skewed negatively, as the mean was less than the median. The Smoker data however has a mean greater than the median indicating a positive skew in the data. Neither data groups contain outliers which would throw off the mean and are both unimodal in their distribution. When comparing the boxplots of the data groups it shows that the smoker group has the greatest range in cholesterol levels from 351 to 155, versus ex-smokers which ranges from 328 to 134. Ex-Smokers also have both quartiles lower than smokers, Ex-Smoker quartiles are at 263 for Q3 and 200 for Q1. Smokers are at 267 for Q3 and 211 for Q1. In conlusion of camparison of the data it can be safely assumbed that Ex-smokers are likely to have lower cholesterol levels than smokers on average.

Result 1: Histogram of Smoker Data #37   [Info]
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Result 2: Histogram of Ex-Smoker Data #37   [Info]
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Result 3: Boxplot of Smoker Cholesterol #37   [Info]
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Result 4: Boxplot of Ex-Smoker Cholesterol   [Info]
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Data set 1. Problem 37 Smoker/Ex-Smoker Data   [Info]
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