1. Regression inference

2. Infants who cry easily may be more easily stimulated than others
Infants who cry easily may be more easily stimulated than others. This may be a sign of higher IQ. A snap of a rubber band on the sole of the foot caused the infants to cry. They later measured the children's IQ at age three years using the Stanford-Binet IQ test.

3. Crying and IQ

4. Explanatory variable
Response variable
Correlation:
Coefficient of determination:

5. Regression model
Sample SD about residuals (standard error or SE)

7. Slope inference
Estimate of slope t*
SE of slope
95% CI for true slope

8. Interpretation of interval: