Categorical Independent Variables

Dataset: daycare_cat.sav

Variables explanations:

ID

Reading: Kindergarten reading score

SES: Socioeconomic Status

Care: Type of pre-kindergarten non-parental care

1: relative care

2: non-relative care

3: center care

4: Head Start

Questions:

1. Use dummy variable coding with Head Start as the reference group.

a. Controlling for SES, does the type of care have a significant effect on Childrenâ€™s reading score in kindergarten? (Explain it in detail)

b. Please interpret the estimated intercept and the regression coefficients, and their corresponding significance tests.

c. Compute the predicted means of reading for each type with average SES.

2. Use unweighted effects coding with relative care as the base group.

a. Controlling for SES, does the type of care have a significant effect on Childrenâ€™s reading score in kindergarten? Compare the results with Question1(a).

b. Please interpret the estimated intercept and the regression coefficients, and their corresponding significance tests.

c. Compute the predicted means of reading for each type with average SES? Compare the results with question1(c).

**Subject Mathematics Statistics-R Programming**