Nurs 480:Quiz 2 Research

• Question 3 There is no measurable difference in incidence of incarceration for adolescent children whose mothers work outside the home in comparison with those whose mothers do not work outside the home. The above statement is an example of which of the following? Answer s: Response Feedback : a. Research question b. Research objective c. Aim of the study d. Null hypothesis A hypothesis is a formal statement of the expected relationship or relationships between two or more variables in a specified population. The null hypothesis, also referred to as a statistical hypothesis, is used for statistical testing and interpretation of statistical outcomes. The null hypothesis can be simple or complex and associative or causal.The null hypothesis states that there is no relationship between two or more variables. Extraneous variables exist in all studies and can affect the measurement of study variables and the relationships among them. Research objectives or aims are clear, concise, declarative statements that are expressed in the present tense, focus on one or two variables (or concepts), and indicate whether the variables are to be identified or described. A research question is a concise, interrogative statement that is worded in the present tense and includes one or more variables (or concepts). • Question 4 The report of a research study on a new medication to treat hypertension included this statement: “There was no significant difference in gender or age between the treatment and control groups.” Based on the statement, the reader of the report recognizes that gender and age were Answer s: Response a. demographic variables b. moderator variables c. confounding variables d. Environmental variables Age and Gender are demographic Feedback: variables • Question 5