A researcher plans to conduct an experiment evaluating the effect of a treatment. A sample of participants is selected and each person receives the treatment before being tested on a standardized dexterity task. The treatment is expected to lower scores on the test by an average of 30 points. For the regular population, scores on the dexterity task form a normal distribution with μ and . If the researcher uses a two-tailed test with , what is the power of the hypothesis test? Again assuming a two-tailed test with , what is the power of the hypothesis test if the sample size is increased to ?