Question

PCBs and Pelicans. The data from Exercise $14.40$for shell thickness and concentration of PCBs of $60$Anacapa pelican eggs are on the WeissStats site. Specified value of the predictor variable: $220ppm$.

Short answer

Part (a) clearly shows that the assumptions for regression inferences are violated. As a result, the distance from part (b) to part (f) cannot be calculated.

Step-by-step solution

Given information

To determine whether the conditional mean and predated value t-interval procedures can be applied to data.

Explanation

Given that,

Calculation:

Using Exercise $14.40$, determine whether it is reasonable to apply the conditional mean and predated value t-interval procedure to data.

• The residual plot clearly shows that the residuals are in the horizontal band.
• The normal probability plot of residuals shows that the residuals appear in a linear pattern.

As a result, for the variables thickness and PCB, assumption $1-3$for regression inferences is not violated. The data from Exercise $14.76$do not provide enough evidence to conclude that PCB is useful for predicting THICKNESS. As a result, the linear model cannot be used to predict the variables.

Part (a) clearly shows that the assumptions for regression inferences are violated. As a result, from part (b) to part.

Conclusion

As a result of part (a), it is clear that the assumptions for the regression inferences are violated. As a result, the distance between parts (b) and (f) cannot be calculated.