A random sample of 100 two-month-old babies is obtained, and the mean head circumference is found to be 40.6 cm and the standard deviation 1.6 cm. Use a 0.05 significance level to test the claim that the mean head circumference of all two-month-old babies is equal to 40 cm. Use both the p-value and the rejection point methods.

Answer rating: 100% (QA)

H 0 mu 40 H a mu eq 40 Two tailed Test statistics t b... View the full answer