owing 13 questions (Q1 to Q13) are based on the following example: Patients recovering from an appendix operation normally spend an average of 6.3 days in ital. The distribution of recovery times is normal with a o = 2.0 days. The hospital is new recovery program designed to lessen the time patients spend in the hospital. The appendix patients in this new program were released from the hospital in an average of . On the basis of these data, can the hospital conclude that the new program has a ant reduction of recovery time. Test at the .05 level of significance. The appropriate statistical procedure for this example would be a A. t-test B. z-test