EXERCISE 2

Write the equation for a linear model that explains the relationship between how well kids score in tests at school in relation to the average IQ of the parents, and whether their parents graduated from high school, knowing that:

1. If a kid has parents with an average IQ of 0 (hypothetical and unrealistic value), and who did not complete high school, then we would predict this kid's test score to be 26
2. Comparing children whose parents have the same IQ but differed in whether they completed high school, then the model would predict an expected difference of 6 in their test scores
3. Comparing children with the same value of parents who completed high school but who different 10 points in IQ, we would expect to see a difference in 6 points in the child's test score
4. Approximately 68% of the children's test scores fall within a factor of 1.1 of the predicted scores