10.54 Reading test scores and IQ. For a study of reading ability in schoolchildren, researchers collected reading test scores and IQ scores for a sample of 60 fifth-grade children.22

  1. (a) Run the regression and summarize the results of the significance tests.

  2. (b) Rerun the analysis with the four possible outliers removed. Summarize your findings, paying particular attention to the effects of removing the outliers.