• with the increase in childhood obesity, the pediatrics association is concerned about the amount of physical activity children obtain daily. in 2012 the pediatric association found that only 48% of children between the ages of five and twelve were physically active for at least one hour a day, where physically active refers to any activity that increases the childs heart rate to the aerobic zone. A random sample of 250 children between the ages of five and twelve was obtained. Of those sampled, 59% saod tjeu were physically active for at last one hour a day. At the 1% significance level, can the Pediatrics Association conclude that the proportion of children between the ages five and twelve that are physically active for at least one hour a day has changed?