Question
The following information is obtained to study the relationship between average rainfall $($in $cm.)$ and the yield of maize $($in quintal per hectare$)$ in different taluka of Gujarat :
Estimate the yield of maize when the rainfall is $70\ cm$.OR Obtain the regression line of $Y$ on $X$ from the following data and estimate $Y$ for $X=30 . n=10, \sum x=250, \sum y=300, \sum x y=7900, \sum x^2=6500$
| Particulars | Rainfall $(cm)$ | Yicld of Maize $($Quintal per hectare$)$ |
| Mean | $30$ | $500$ |
| variance | $25$ | $10,000$ |
| Correlation coefficient $= 0.80$ | ||
