Question

The larger the within-groups (error) variance​

	a.	the easier it becomes to show the effects of experimental treatment.
	b.	​the more difficult it becomes to perform the F test.
	c.	the more difficult it becomes to show the effects of experimental treatment.
	d.	the easier it becomes to show a causal effect of the independent variable on the dependent variable.

Answer 1

Option C is correct

{the more difficult it becomes to show the effects of experimental treatment.}

This is because the F statistic is ratio of between groups variance to the within group variance (with degree of freedoms). As the within groups variance becomes larger, the F statistic becomes smaller and this results in an insignificant hypothesis test result.

therefore, option C