Warunki dla przedziału t dla średniej

Nolan was studying birth weights of infants in Somalia. He took an SRS (simple random sample) of $100$‍ births and calculated a sample mean birth weight of $\overline{x}=3.2\text{ kg}$‍. The sample data was slightly skewed with a few outliers. He is considering using his data to construct a confidence interval for the mean birth weight in Somalia.