Question

A researcher knows that the weights of 6-year-olds are normally distributed with u = 20.9 kg and o = 3.2. She suspects that children in poverty-stricken regions are undernourished and therefore underweight. With a sample of n = 16 children, the researcher obtains a sample mean of M = 18.3. Use a one-tailed test with  = .01 to determine if the weights for this sample are significantly lower than what would be expected for the regular population of 6-year-olds

Answer 1