The average human gestation time is 266 days from

Last updated: 7/13/2022

The average human gestation time is 266 days from conception. A researcher suspects that proper nutrition plays an important role and that poor women with inadequate food intake would have shorter gestation times even when given vitamin supplements. A random sample of 20 poor women given vitamin supplements throughout the pregnancy has a mean gestation time from conception of x̄ = 256 days. The researcher's alternative hypothesis for the test is Ha: μ< 266. Ha: μ <256. Ha: μ = 266. Ha: μ ≠ 256.