Chapter 12.2, Problem 39E

To determine

To find: the predicted weight of brain on the basis of given information.

Answer to Problem 39E

334.734 grams

Explanation of Solution

Given:

  

  $\log y=1.01+0.72\log x$

Calculation:

Putting the value of x in the regression equation

  $\begin{array}{c}\log y=1.01+0.72\log \left(127\right)\\ =2.5247\end{array}$

Taking the exponential with base 10 of each side of the result

  $\begin{array}{c}y={10}^{\log y}\\ ={10}^{2.5247}\\ =334.734\end{array}$

Therefore the expected brain weight is 334.734 grams.