A sample of 300 residents from Seattle is taken to estimate the median income of all Seattle residents Is this study OA REPRESENTATIVE B NON REPRESENTATIVE A simple random sample of 2000 men over age 18 is taken to estimate the mean weight of all adult males Is this study OA REPRESENTATIVE B NON REPRESENTATIVE A simple random sample of 10 men over the age 18 is taken to estimate the mean height of all adult males Is this study A REPRESENTATIVE OB NON REPRESENTATIVE A telephone survey of 1000 registered voters is conducted during the day in order to determine the chances of a certain candidate winning an election Is this study OA REPRESENTATIVE B NON REPRESENTATIVE A simple random sample of 400 U S citizens is taken in order to estimate the mean cholesterol level of U S citizens Is this study A REPRESENTATIVE B NON REPRESENTATIVE