A student in HSC6911 studied the effect of diabetic disease management on patients' A1C blood test results. The student placed 22 new diabetic patients that presented at a local clinic into two groups: 12 were placed in a group in which the patients received the usual treatment plus they additionally received disease management care; 10 were placed in a group in which the patients received the usual treatment only. After 6 months the student measured A1C levels of the patients in both groups. The mean A1C blood level for the 12 patients in the treatment group was 7 (unit: percent), with an unbiased variance of 1. The mean A1C blood level for the 10 patients in the control group was 8.5 (unit: percent) with an unbiased variance of 1. What is the pooled variance for these two groups? A student in HSC6911 studied the effect of diabetic disease management on patients' A1C blood test results. The student placed 22 new diabetic patients that presented at a local clinic into two groups: 12 were placed in a group in which the patients received the usual treatment plus they additionally received disease management care; 10 were placed in a group in which the patients received the usual treatment only. After 6 months the student measured A1C levels of the patients in both groups. The mean A1C blood level for the 12 patients in the treatment group was 7%, with an unbiased variance of 1. The mean A1C blood level for the 10 patients in the control group was 8.5% with an unbiased variance of 1. Using the pooled variance you calculated in question # 1, what is the t value for thet test that compares the AIC levels of the treatment group to the control group?