5. A dummy medication (such as a salt tablet) will often help a patient who trusts the doctor who administers the medicine. This is called: the placebo effect. O confounding variables. double-blindness. confidentiality.

Does the new training program appear to be more effective than the older training program in lowering the weight of its new prospects?

27. Place (click and drag) the description of the study design to the type of study being conducted. Does a certain multivitamin help people lose weight? Researchers randomly select 100 people to participate in the study. Half of them are given the multivitamin. Half of them are given a fake pill. The weights of all of them are recorded daily for the next three months. How do business customers feel about the level of support they receive? The business randomly selects 200 customers and asks them to share their opinions. Do truck drivers get into more accidents than people who drive SUVS? Researchers use police records of automobile accidents over the past year and vehicle registrations to compare the percentage of drivers of vehicles of each type that get into accidents. Survey Observational Study Experimental Study

Exercise is known to produce positive psychological effects. Interestingly, not all exercise is equally effective. It turns out that exercising in a natural environment (e.g., jogging in the woods) produces better psychological outcomes than exercising in urban environments or in homes (Mackay & Neill, 2010). Suppose that a sports psychologist is interested in testing whether there is a difference between exercise in nature and exercise in the lab with respect to post-exercise anxiety levels. The researcher recruits n 5 7 participants who exercise in the lab and exercise on a nature trail. The data below represent the anxiety scores that were measured after each exercise session.   Treat the data as if the scores are from an independent-measures study using two separate samples, each with n 5 7 participants. Compute the pooled variance, the estimated standard error for the mean difference, and the independent-measures t statistic. Using a 5 .05, is there a significant difference…