Advertisements
Advertisements
प्रश्न
Collect the price of five vegetables from your local market every day for a week. Calculate their correlation coefficients. Interpret the result.
बेरीज
उत्तर
| Day | Potato (per kg) | Tomato (per kg) | Onion (per kg) | Babycorn (per kg) | Broccoli (per kg) |
| 1 | 18 | 30 | 35 | 110 | 170 |
| 2 | 18 | 35 | 36 | 112 | 165 |
| 3 | 18 | 32 | 35 | 120 | 150 |
| 4 | 20 | 32 | 34 | 118 | 155 |
| 5 | 20 | 35 | 36 | 115 | 155 |
| 6 | 20 | 35 | 35 | 110 | 160 |
| 7 | 21 | 32 | 35 | 111 | 165 |
Correlation between prices of potato and tomato
| Potato (per kg) (x) | Tomato (per kg) (Y) | `X -overlineX` | `(X -overlineX)^2` | `Y -overlineY` | `(Y -overlineY)^2` | `(X -overlineX)` `(Y -overlineY)` |
| 18 | 26 | -1 | 1 | -4 | 16 | 4 |
| 18 | 31 | -1 | 1 | 1 | 1 | -1 |
| 18 | 28 | -1 | 1 | -2 | 4 | 2 |
| 18 | 28 | -1 | 1 | -2 | 4 | 2 |
| 20 | 31 | 1 | 1 | 1 | 1 | 1 |
| 20 | 35 | 1 | 1 | 5 | 25 | 5 |
| 21 | 31 | 2 | 4 | 1 | 1 | 2 |
| ∑X = 133 | ∑Y = 210 | ∑`(X -overlineX)^2` = 10 | `(Y -overlineY)^2 = 52` | ∑`(X -overlineX)` `(Y -overlineY)` = 15 |
r = `(sum(X - overlineX)(Y - overlineY))/sqrt(sum(X - overlineX)^2(Y - overlineY)^2` = +0.65
Likewise we can calculate correlation between different pairs of vegetables or we can use multivariate correlation to find the relation between the vegetables.
shaalaa.com
Measures of Correlation - Karl Pearson'S Method (Two Variables Ungrouped Data)
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
