Measures of Skewness - curve has a longer tail on the right...

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Measures of Skewness A distribution in which the values equidistant from the centre have equal frequencies is defined to be symmetrical and any departure from symmetry is called skewness. 1. Length of Right Tail = Length of Left Tail 2. Mean = Median = Mode 3. Sk=0 a) Sk=(Mean-Mode)/SD b) Sk=(Q3-2Q2+Q1)/(Q3-Q1) A distribution is positively skewed , if the observations tend to concentrate more at the lower end of the possible values of the variable than the upper end. A positively skewed frequency
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Unformatted text preview: curve has a longer tail on the right hand side 1. Length of Right Tail > Length of Left Tail 2. Mean > Median > Mode 3. SK>0 4. A distribution is negatively skewed , if the observations tend to concentrate more at the upper end of the possible values of the variable than the lower end. A negatively skewed frequency curve has a longer tail on the left side. 5. Length of Right Tail < Length of Left Tail 6. Mean < Median < Mode 7. SK< 0...
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This note was uploaded on 06/19/2011 for the course ECON 202 taught by Professor Pharuddin during the Summer '11 term at The School of the Art Institute of Chicago.

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