<p>STA10 Basic Statistics and Quantitative Literacy Chapter 5-6 Name: Warm-up Exercise: May 25, 2006</p><p>1. Which of the following defines what is meant by a control group in an experiment? a. A group that is handled identically to the treatment group(s) in all respects except that they are controlled to a greater extent than the other groups, providing baseline data. b. A group that is used by researchers to monitor how the experiment is going. c. A group that is handled identically to the treatment group(s) in all respects except that they don’t receive the active treatment. d. None of the above.</p><p>2. Which of the following is not true about placebos? a. Placebos can be very effective in producing a response. b. Placebos are only useful if the subject is blind as to whether or not they receive one. c. Participants assigned a placebo are part of the control group of an experiment. d. All of the above are true statements.</p><p>3. Which of the following is implemented in an experiment to reduce unknown systematic biases due to confounding variables that might otherwise exist between treatment groups? a. Randomization b. Placebo c. Matched-pairs d. None of the above </p><p>4. Which of the following is implemented in an experiment to reduce known sources of natural variability in the response variable, so that differences due to the explanatory variable can be detected more easily? a. Matched-pairs b. Repeated Measures c. Block d. All of the above</p><p>5. Is a case-control study an example of a randomized experiment or an observational study? </p><p>6. Which of the following helps establish cause and effect? a. Random Sample b. Random Assignment</p><p>7. Which of the following allows us to extend results to a larger population? a. Random Sample b. Random Assignment</p>