Appropriate Applet link: http://www.rossmanchance.com/ISIapplets.html

1.5.16 A recent article (Hauser, Glynn, and Wood, 2007) described a study that investigated whether rhesus monkeys have some ability to understand gestures made by humans. In one part of the study, the experimenter approached individual rhesus monkeys and placed two boxes an equal distance from the monkey. The experimenter then placed food in one of the boxes, making sure that the monkey could tell that one ofthe boxes received food without revealing which one. Finally. the researcher pointed and looked toward the box that contained the food. This process was repeated for a total of 40 rhesus monkeys. It turned out that 31 ofthe monkeys approached the box that the human had gestured toward. and 9 approached the other box. The purpose is to investigate whether rhesus monkeys can interpret human gestures better than random chance. Which of the following states the appropriate null and alternative hypotheses in the context ofthis study, rst in words and then in symbols? 0 Null: The long-run proportion of rhesus monkeys that choose the correct box is 50%, 11 = 50% Alt: The long-run proportion of rhesus monkeys that choose the correct box is more than 50%.11 > 50% O Null: The long-run proportion of rhesus monkeys that choose the correct box is 50%, II = 50% Alt: The long-run proportion of rhesus monkeys that choose the correct box is less than 50%, n