Chapter 12, Problem AP4.29CPT

To determine

To find out what would be the effect on the value of s if the bear given is added to the data set.

Answer to Problem AP4.29CPT

Option (b) is the correct option.

Explanation of Solution

Park rangers are interested in estimating the weight of the bears that inhabit their state. The output of this data is given in the question. Thus, we note that if we would add the bear with the neck girth inches and weight pounds to the scatterplot, then the corresponding point would be added in the top right corner of the scatterplot. Moreover, this plot will lie in the extension of the least square regression line and thus will lie on the least square regression line. Also, the standard error of the estimate s will then also decrease because the added data will have a perfect prediction. Thus, our predictions are more accurate resulting in less variations and thus a lower standard error of the estimate s. thus, the option (b) is the correct option.