A possible important environmental determinant of lung function in children is amount of cigarette smoking in the home. Suppose this question is studied by selecting two groups: Group 1 consists of nonsmoking children 5-9 years of age with two parents who smoke, while Group 2 consists of nonsmoking children 5-9 years of age with two parents who do not smoke. Forced expiratory volume (FEV) is a measure of lung function and refers to how much air a person can exhale during a forced breath.

Explain the effect of increasing on the power of a test. What is one disadvantage to increasing , from a decision-making standpoint?