Marissa, an actress, is giving a speech on getting started in the entertainment industry. Marissa has high initial credibility, but as she gives her speech, it becomes quickly apparent that her start as an actress depended entirely on her uncle, a producer, and not her talent or hard work. As a result, her credibility drops. This is an example of how the credibility of a speaker is

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.