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Com 200 exam 2 notes

Com 200 exam 2 notes - Com 200 Shapes and Distributions We...

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Com 200 10/7/2010 Shapes and Distributions We also previously discussed histograms note that we could take a smooth curve along the top of a histogram to represent the data That curve is called a frequency curve Shape Terms Skewed Skewed to the right: higher values more spread out than lower values Skewed to the left: Lower values are more spread out than higher ones Symmetric: if you were to draw a line through the center, picture on one side mirror image of the other Outliers: one or few scores far removed from the rest of the date Unimodal: one prominent peak in a histogram or frequency curve Bimodal: two prominent peaks The normal curve Normal curve: a distribution whose frequency curve is bell shaped Many distributions follow this curve: pulse rate, IQ, male height, female height, overall ideology of the population If date from a population is normal, we can easily estimate the proportion of people within any given interval on the curve

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Com 200 exam 2 notes - Com 200 Shapes and Distributions We...

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