3 A strategy used to remedy heterogeneity of slopes in ANCOVA is known as 'blocking the covariate'. This involves:

Select one:

a.

Using a 'median split' to divide the DV into groups

b.

Pooling the regression estimate of all slopes

c.

Performing Mauchly's test of sphericity

d.

Performing a two-way ANOVA after splitting the covariate into groups to assess the interaction effect