EC255 Study Guide - Midterm Guide: Interquartile Range, Box Plot, Standard Deviation

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A diagram that uses the upper and lower quartiles along with the median and the two most extreme values to depict a distribution graphically; sometimes called a box plot. A theorem stating that at least 1 1/k2 values will fall within k standard deviations of the mean regardless of the shape of the distribution. A measure of the degree of skewness that exists in a distribution of numbers; compares the mean and the median in light of the magnitude of the standard deviation. The ratio of the standard deviation to the mean, expressed as a percentage. The difference between a number and the average of the set of numbers of which the number is a part. A guideline that states the approximate percentage of values that fall within a given number of standard deviations of a mean of a set of data that are normally distributed. The range of values between the first and the third quartile.