A hospital in Nashville is considering changes to the prenatal care they offer. They collected a random sample of gestation times of 70 pregnancies that ended in live births. The established human gestation time is 266 days. The hospital wants to know whether the average gestation time is different from 266 days at their hospital. What is the alternative hypothesis? Ha: μ=266 Ha: μ<266 Ha: μ>266 Ha: μ=266