As part of a study a researcher compares the variances of her different groups. She has four groups and finds the following results:

s12=1

s22= 2

s32= 3

s42= 1.5

Based upon this, the researcher realizes what?

Group of answer choices

there is a significant difference in the group means

there is homogeneity

there is heteroscedasticity

she needs to rearrange people in her groups