The part B of Figure 4.4, see Example 4.5, clearly shows the presence of outliers for the number of dead insects for insecticides C and D. Identify the outlying data points. Remove the outlying points, and then check if any more potential outliers are present.

Data from in Figure 4.4

Data from in Example 4.5

This dataset was used earlier as an example of an x-y plot. The scatter plot of the parents and the child reflected weak correlation in Figure 4.11, and now we examine and estimate the effect by using the resistant line model. The function resistant_line from the companion package will be used to build the model 4.11.

Transcribed Image Text:

10 8 9 4 2 A: Boxplot for Memory Recall Pleasant.memory Unpleasant.memory 25 20 15 10 5 0 A B: Boxplot for InsectSprays B O F DE F