Dr. Pinner is interested in studying the association between likeability and popularity and plans on using two groups and three levels of the independent variable. Dr. Pinner will randomly select a group of elementary school students and a group of high school students. Students will then to do three different performance activities in front of their peers. Dr. Pinner is likely to find:

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?