A research assistant is helping to collect observational data. However, he is careless in scoring the observations. As a result, dependent variable scores are inaccurate and prone to error.

Directions for this set of practice exercises: A researcher is conducting studies under the following conditions. For each study,

a. State whether the change in condition will tend to increase or decrease the study’s power and

b. If the change in condition affects primarily the numerator or the denominator of the test statistic, state which part is primarily affected.