STT 201 Lecture Notes - Lecture 29: Quartile, Interquartile Range, Standard Deviation
18 Jul 2019
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Document Summary
Data that have been arranged in numerical order symmetric data. Data sets whose values are evenly spread around the center. For symmetric data, the mean and median are equal skewed data. For skewed data, the mean will be larger or smaller than the median right-skewed data. A data distribution is right skewed if the mean for the data is larger than the median left-skewed data. A data distribution is left skewed if the mean for the data is smaller than the median mode. The mode is the value in a data set that occurs most frequently weighted mean. The mean value of data values that have been weighted according to their relative importance percentiles. The p th percentile in a data array is a value that divides the data set into two parts. The lower segment contains at least p% and the upper segment contains at least (100 - p)% of the data.
