Suppose that a normal model describes student scores on the final exam in a Statistics class. Miguel's final exam has a standardized score (z-score) of 1.0. This means that: Group of answer choices his score was 1 point above the class average, so he scored better than about 55% of the class. his score was 1 standard deviation above the mean, and he scored better than about 84% of the class. his score was in the 10th percentile, and he scored better than 10% of the class. he got one question correct and earned a 1%.