The association between the weight of a seal's spleen, spleen weight, in grams, and its age, in months, for a sample of seals is non-linear.
This association can be linearised by applying a \(\log _{10}\) transformation to the variable spleen weight.
The equation of the least squares line for this scatterplot is
\(\log _{10}\) (spleen weight) = 2.698 + 0.009434 × age
Question 7
The equation of the least squares line predicts that, on average, for each one-month increase in the age of the seals, the increase in the value of \(\log _{10}\) (spleen weight) is
- 0.009434
- 0.01000
- 1.020
- 2.698
- 5.213
Question 8
Using the equation of the least squares line, the predicted spleen weight of a 30-month-old seal, in grams, is
- 3
- 511
- 772
- 957
- 1192