Emma is a school psychologist studying whether students who participate in physical education classes at school spend more of their free time in independent active play. Below is a scatterplot of some of her data comparing hours participating in physical education and the number of minutes each day children reported that they spent in active play. Which of the following is true? Emma's Study of PE and Play 80 70 60 50 40 30 20 10 5 10 15 20 25 Hours of PE in Semester O Emma should infer that more time in physical education is positively associated with more independent active play. O Emma should infer that more time in physical education is negatively associated with more independent active play. O Emma should infer that there may be no association between time in physical education and active play. O Emma should infer that about 20 hours of physical education per semester is useful. Minutes Playing Each Day

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.