. 2020 Jul 5;19:100605. doi: 10.1016/j.conctc.2020.100605

Table 5.

Mean models of the 9-month spelling score.

Model	Formulation
1	$μ_{i j} = E (Y_{i j}) = β_{0} + β_{1} X_{i}$
2	$μ_{i j} = E (Y_{i j}) = β_{0} + β_{1} X_{i} + β_{B} B_{i j} + β_{C} C_{i j} + β_{E} E_{i}$
3	$μ_{i j} = E (Y_{i j}) = β_{0} + β_{1} X_{i} + β_{B} B_{i j} + β_{C} C_{i j} + β_{D} D_{i j} + β_{E} E_{i}$