I'm getting these wrong. Please help. My incorrect answers are below.

Run the appropriate hypothesis test and record the test-statistics (z or t) for each of the samples. Sample 1 (Round to 4 decimal places): -1.0604. This is incorrect.

Sample 2 (Round to 4 decimal places): 0.7354. Incorrect too.

Sample 3 (Round to 4 decimal places): -2.8477. wrong.

Sample 4 (Round to 4 decimal places): 2.0866, wrong again.

Sample 1	Sample 2	Sample 3	Sample 4
11.55	11.62	11.91	12.02
11.62	11.69	11.36	12.02
11.52	11.59	11.75	12.05
11.75	11.82	11.95	12.18
11.9	11.97	12.14	12.11
11.64	11.71	11.72	12.07
11.8	11.87	11.61	12.05
12.03	12.1	11.85	11.64
11.94	12.01	12.16	12.39
11.92	11.99	11.91	11.65
12.13	12.2	12.12	12.11
12.09	12.16	11.61	11.9
11.93	12	12.21	12.22
12.21	12.28	11.56	11.88
12.32	12.39	11.95	12.03
11.93	12	12.01	12.35
11.85	11.92	12.06	12.09
11.76	11.83	11.76	11.77
12.16	12.23	11.82	12.2
11.77	11.84	12.12	11.79
12	12.07	11.6	12.3
12.04	12.11	11.95	12.27
11.98	12.05	11.96	12.29
12.3	12.37	12.22	12.47
12.18	12.25	11.75	12.03
11.97	12.04	11.96	12.17
12.17	12.24	11.95	11.94
11.85	11.92	11.89	11.97
12.3	12.37	11.88	12.23
12.15	12.22	11.93	12.25