A standardized exam's scores are normally distributed . In a recent year , the mean test score was 1529 and the standard deviation was 320. The test scores of four students selected at random are 1940 , 1250 , 2240 , and 1410. the z- scores that correspond to each value and determine whether any of the values are unusual. The z score for 1940 is= The z score for 1250 is= The z score for 2240 is= The z score for 1410 is= Which values, if any, are unusual? A. The unusual value(s) is/are= or B. None of the values are unusual