Question

A researcher would like to determine the relationship between drought length (lack of rain) and the size of a forest fire (fire intensity). It was found that as number of days without rain increased the risk of fire intensity also increased. The two variables were measured on a number of locations in California and a least squares regression line was calculated. It was report that 74% of the variation of fire intensity was explained by its regression on draught length. What is the value of the correlation between these two variables.

elect one:

a. -0.46

b. 0.82

c. 0.42

d. -0.82

e. 0.86

Answer 1

We have given,

Coefficient of determination

Therefore, Correlation coefficient

Positve relationship between two variable

e) 0.86