Suppose that 50% of all adult Americans believe that they are unable to stop thinking about work while on vacation.

Suppose that 50% of all adult Americans believe that they are unable to stop thinking about work while on vacation.

1. What is the probability that more than 56% of a random sample of 150 adult Americans would hold this belief?

2. If the sample of 150 was made up of adults randomly selected from each of the eight regions of the U.S. (i.e. New England, Midwest, Great Lakes, Plains, Southeast, Southwest, Rocky Mountains and Far West) which sampling design was used?