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Data Processing
What is coefficient of variation?
Coefficient of Variation : This concept is used to make comparison of dispersion or variation between two or more series. It is relative measure of variation. In the words of Karl Pearson, “Coefficient of variation is the percentage variation in the mean, the standard being treated as the total variation in the mean”. In fact, coefficient of variation is the percentage expression of standard deviation. Coefficient of
Where σ = standard deviation and 
Arithmetic mean.
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What is perfect correlation ?
Explain relative position of mean, median and mode in a normal distribution and skewed distribution with the help of diagram.
Comment on the applicability of mean, median and mode.
Explain the process of computing Standard Deviation with the help of an imaginary example.
Which measures of dispersion is the most unstable statistic and why?
Write a detailed note on the degree of correlation.
What are various steps for the calculation of rank order correlation?
Take an imaginary example applicable to geographical analysis and explain direct and indirect methods of calculating mean from ungrouped data.
Draw scatter plots showing different types of perfect correlations.
What is Median?
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