Suppose there exists a population where 85 of its members possess a certain characteristic Let be the proportion of a random sample of 342 members that also possess that certain characteristic Determine the following probabilities Round solutions to four decimal places if necessary Find the probability that the sample proportion is less than 0 87 P p 0 87 Find the probability that the sample proportion is between 0 78 and 0 85 P 0 78 p 0 85