Question

ABC University claims that because of its superior facilities and close faculty supervision, its students complete the Ph.D program earlier than usual. They base this assertion on the fact that the population mean age for completion is µ = 32.11. Their n = 31 Ph.D’s have a mean age of M = 30.89, with a standard deviation of s = 4. Test the validity of their assertion using a two-tailed test with alpha set to α = .05.  

Answer 1