Question
In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance
In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles) and the tread depth was measured after the drive. Tread depth is measured in "mils." Here, 1 mil is 0.001 inch. The least-squares regression line was computed, and added to a scatterplot of these data. On the plot, one data point is marked with an "X."
The equation of the least-squares regression line is: Tread depth = 360.64 - 11.39x (thousands of miles)
Also,r2 = 0.953. Which statement is TRUE?
A) | The correlation between tread depth and miles is -0.976. |
B) | The correlation between tread depth and miles is -0.953. |
C) | The correlation between tread depth and miles is 0.976. |
D) | The correlation between tread depth and miles is 0.953. |
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