Ricardo scored 83 in the class with the mean 78.8 and the standard deviation 5.1, but Lloyd scored 57 in the class with the mean 50.8 and the standard deviation 7.3. Who scored relatively better? (Round the answers to 2 decimal places)
Ricardo's z-score is ________ and Lloyd's z-score is _______ Since Ricardo's z-score is ________ Lloyd's z-score, we conclude that ________.