Julian_Jordan_Assignment4

Julian_Jordan_Assignment4 - Assignment 4 Comparing Two...

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Assignment 4: Comparing Two Means Julian Jordan STAT 4210 STAT 4210 – Statistical Methods Due: October 19, 2016 at 9:00 am 1. To clean this data, I first deleted each row for individuals that were sophomores or juniors. Next, for the hours of sleep column I had to clean up the data by deleting the non-numeric values that some individuals included in their responses. This consisted of standardizing entrees with “hours”, “hrs” or similar input by keeping the number and getting rid of the rest. I also standardized the values by changing numbers like “7:30” and “7 ½” to “7.5”. Individuals who did not have an “hours of sleep” column filled out were removed from the data set. 2. The shape of the distribution of sleep for juniors and seniors are similar in that they are both normally distributed. The spread for both data sets seem to be relatively the same as well. This is especially realized in that both have standard deviations of about 0.95. Some distinctions between these groups lie in the center and in the outliers of these groups. Although both of these distributions are centered around the mean, the mean of average hours of sleep for the junior is slightly higher than that of the seniors at a value of 7.14 hours. The mean for the average hours of sleep for the seniors is at a value of 6.72. Another interesting distinction between these two groups is that the outlier for the Junior's distribution is an outlier that is reasonably lower than the mean at a value of 4.

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