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Board Question Paper : July 2019 — Statistics STD 12 Commerce — Question

Gujarat BoardEnglish MediumSTD 12 CommerceStatisticsBoard Question Paper : July 20193 Marks
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 :
Particulars Rainfall $(cm.)$
$(X)$		 Yield Of size $(Y)$
$($Quintal per hectare$)$
Mean $82$ $180$
Variance $64$ $225$
Correlation coefficient $r = 0-82$
Estimate the yield of maize when the rainfall is $60 \ cm.$
✓

Answer

$a=53.72$

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