A biologist wants to know if a new method for implanting organs will help the implanted organ be accepted by the donor's body. He tries the method on a sample of 35 mice and finds a P-value of 0.078 when comparing the success with this method to the success in another identical, randomly selected group of mice treated with the standard method. Another experiment showed a P-value of 0.006 with a sample of 150 mice, indicating the implantations were better with the new method. What is the most likely reason why the two experiments produced different P-values? The second group of mice was in better physical condition. The second group had more micea larger sample size. Some outliers probably affected the analysis