A makketing resoarcher for a phone company surveys 300 people and finds that the proportion of cluents who are likely to switch providera when ther contract expires is 0.14 a) What is the standard deviation of the sampling distrbution of the proportion? b) If she wants to reduce the standard deviation by half, how large of a samplo vould she need? a) The standard deviation of the sampling distribution of the proportion is (Round to three docimal places as needed)