estion. K A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1495 and the standard deviation was 320. The test scores of four students selected at random are 1930 1230 2220, and 1400. Find the z-scores that correspond to each valu determine whether any of the values are unusual The z-score for 1930 is (Round to two decimal places as needed.) The z-score for 1230 is (Round to two decimal places as needed.) The z-score for 2220 is (Round to two decimal places as needed.) The z-score for 1400 is (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The unusual value(s) is/are (Use a comma to separate answers as needed.) OB. None of the values are unusual