Foundations of Nursing 1. A mixed methods research design means two types of quantitative studies are used to collect and analyze the data. Fals e 2. In quantitative experimental research, the independent variable is manipulated to determine the effects on the dependent variable Tru e 3. A research may choose to conduct a pilot study before the main study is conducted in order to determine if the data collection tool will measure the dependent variable accurately. Tru e 4. A random table of numbers may be used to select participants for an experimental study Tru e 5. The researcher must select an appropriate design for a study in order to eliminate error and make critique of the findings possible. Fals e 6. The pre-test post design is used in correlation research to show there is a relationship between the pre and post interventions. Fals e 7. In research, rigor involves adhering to the study design, paying strict attention to detail, and being sure all data collected is accurate. Tru e