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If observations are not randomly sampled and independent of one another,what happens in ANCOVA?

Multiple Choice

Answer:

A research fellow is conducting an experiment to test a hypothesis.Doubling the sample size will increase the power of the hypothesis test.

True False

Answer:

Analysis of covariance can be used to adjust for pre-existing differences in intact groups.

True False

Answer:

In experimentally designed research,each experimental factor has one treatment level.

True False

Answer:

Doubling the sample size will increase the effect size of the hypothesis test.

True False

Answer:

Doubling the sample size will increase the probability of making a Type II error.

True False

Answer:

It is not possible to use ANCOVA to increase statistical power,only decrease it.

True False

Answer:

By randomly assigning subjects to treatment levels,randomization spreads potential effects of lurking variables roughly evenly across treatment levels.

True False

Answer:

With experimental designs,blinding ensures that subjects in control and treatment conditions experience the placebo effect,but does not guard against confounding.

True False

Answer:

In ANCOVA there should be one covariate fewer than the number of independent variables.

True False

Answer: