In an Area of the Great Plains, Records Were Kept

question 71

Multiple Choice

In an area of the Great Plains, records were kept on the relationship between the rainfall (in inches) and theyield of wheat (bushels per acre) . Calculate the linear correlation coefficient. $$\begin{array} { l | c | c | c | c | c | c | c | c | c | } \text { Rainfall (in inches) , } \mathrm { x } & 9.8 & 8.1 & 12.7 & 11.8 & 18.1 & 9.6 & 6.3 & 14.9 & 15.3 \\\hline \text { Yield (bushels per acre) , y } & 48.5 & 44.2 & 56.8 & 57 & 80.4 & 47.2 & 29.9 & 74 & 76.8\end{array}$$

• A) 0.981
• B) 0.998
• C) 0.900
• D) 0.899

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