A random sample of n people selected from a large population will be asked whether they have read a novel in the past year. Let the random variable r represent the number of people from the sample who answer yes. The variance of random variable r is 6. Assume the responses are independent of each other. If the proportion of people from the population who read a novel in the past year is 0. 40, which of the following is the best interpretation of random variable r ?.