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प्रश्न
The person suggested a mathematical method for measuring the magnitude of linear relationship between two variables say X and Y is
पर्याय
Karl Pearson
Spearman
Croxton and Cowden
Ya Lun Chou
उत्तर
Karl Pearson
APPEARS IN
संबंधित प्रश्न
Calculate the coefficient of correlation between X and Y series from the following data.
| Description | X | Y |
| Number of pairs of observation | 15 | 15 |
| Arithmetic mean | 25 | 18 |
| Standard deviation | 3.01 | 3.03 |
| Sum of squares of deviation from the arithmetic mean | 136 | 138 |
Summation of product deviations of X and Y series from their respective arithmetic means is 122.
Calculate the correlation coefficient for the following data.
| X | 25 | 18 | 21 | 24 | 27 | 30 | 36 | 39 | 42 | 48 |
| Y | 26 | 35 | 48 | 28 | 20 | 36 | 25 | 40 | 43 | 39 |
Example for positive correlation is
Correlation co-efficient lies between
The correlation coefficient is
The variable whose value is influenced (or) is to be predicted is called
If r = – 1, then correlation between the variables
Calculate the correlation coefficient from the data given below:
| X | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Y | 9 | 8 | 10 | 12 | 11 | 13 | 14 | 16 | 15 |
If the points on the scatter diagram indicate that as one variable increases the other variable tends to decrease the value of r will be:
Calculate the Karl Pearson Correlation Co-efficient for the following data:
| Demand for Product X : | 23 | 27 | 28 | 29 |
30 |
31 | 33 | 35 | 36 | 39 |
| Sale of Product Y: | 18 | 22 | 23 | 24 | 25 | 26 | 28 | 29 | 30 | 32 |
