An investigator interested in regional differences in breastfeeding attitudes and practices conducts a national survey. The survey includes a multi-item instrument measuring breastfeeding attitudes. The resulting breastfeeding attitudes scale takes values ranging from 1 to 5, with higher numbers representing more favorable attitudes toward breastfeeding. This scale score is named BRATT in the dataset.

The dataset also includes a variable named region which takes the following values:

1 = Northeast,
2 = Southeast,
3 = Midwest,
4 = Southwest,
5 = Rocky Mountains,
6 = West Coast.

The investigator creates a set of dummy variables and runs a linear regression model with the breastfeeding attitudes scale as the dependent variable.

The estimated model is:

BRATTi = 3.68 + 0.57NORTHEASTi – 0.13SOUTHEASTi – 0.41SOUTWESTi – 0.04ROCKIESi + 0.77WESTCOASTi + ei

According to this model, what is the mean score on the breastfeeding attitudes scale for respondents residing in the Midwest?