Example 2: Crying and IQ ANova Infants who cry easily may be a sign of higher IQ. Crying intensity and IQ data on Crying Io Crying IQ Crying IQ crying b, Dependent vaiable: EB 181091511 1112111416118 Dependant variable CEB Inference for regression When a scatterplot shows a linear relationship between a quantitative explanatory variable x and a quantitative response variable y, we can use the least squares line fitted to the data to predict y for a given value of x. Now we want to do tests and confidence intervals in this9 17 18 Inference for Regression • When a scatterplot shows a linear relationship between a quantitative explanatory variable x and a quantitative response variable y, we can use the least￾squares line fitted to the data to predict y for a given value of x. Now we want to do tests and confidence intervals in this setting. 10 19 Example 2: Crying and IQ • Infants who cry easily may be a sign of higher IQ. Crying intensity and IQ data on 38 infants: IQ=intelligence quotient 20