Calculate Karl Pearson coefficient of correlation using Direct method
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Answer:
Steps involved in the procedure of calculation of Karl Pearson’s coefficient of correlation by direct method.
1. Calculate mean value x and y.
2. Calculate deviations of values of x series from mean value.
3. Square the deviations.
4. Calculate deviation of values of y series from mean value.
5. Square the deviation.
6. Multiply the square of deviation of X series with the square of deviations of Y series.
7. Use the following formula for calculating correlation coefficient
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