An education company representative speaking on a local radio station has advocated that middle school students download a particular app on their phone. The individual cited a study of 1,000 randomly selected middle school seventh- and eighth-grade students that reported that students who downloaded the app on their phones, on average, scored 30 points higher on the Algebra I end-of-course exam than those who did not download the app.
1. Which of the following statements is correct?
O There seems to be a relationship between the app and obtaining a higher score on the Algebra I exam.
O Because downloading the app seems to improve standardized test scores for middle school students, the app should be effective for high school students.
O Downloading the app will cause a student to score higher on an AP Statistics exam.
O The study was an experiment rather than an observational study.
O The sample size of the study was too low to determine a result.