17. In order to survive in today's market place, cost control is extremely

important. A beverage manufacturer wishes to see if a new formulation of

a popular cola using a lower cost sweetener is comparable in taste to the

old formulation. It conducts taste tests to see if consumers find the new

formulation less tasty than the old formulation. It is presumed that

consumers will not be able to distinguish between the two colas. In the

first round of taste tests, 30 people are given both colas in random order.

What is the mean and standard deviation of the number of people

in this group of 30 who will prefer the new cola?