How much wood is in that tree? For a sample of 12 trees the volume of lumber
Question:
How much wood is in that tree? For a sample of 12 trees the volume of lumber (in cubic meters) and the diameter (in centimeters) at a fixed height above ground level were measured. The results were as follows.
a. Compute the least-squares regression line for predicting volume (y) from diameter (x). b. Construct a 95% confidence interval for the slope. c. Test Ho: β1 = 0 versus HI: β1 > 0. Can you conclude that diameter is useful in predicting volume? Use the a = 0.01 level of significance.
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