Question: Marketing and Consumer Behavior According to a recent study, approximately 69% of consumers order food online using a mobile device, for example, a smartphone or tablet. Consumers use mobile applications to check restaurant menus, consider fast-food options, and even to order a pizza. Suppose 220 consumers are randomly selected.
a. Find the probability that the sample proportion of consumers who order food online using a mobile device is less than 0.65.
b. Find the probability that the sample proportion of consumers who order food online using a mobile device is more than 0.72.