A Random Sample Of $n = 12$ Observations Is Selected from a Normal Population to Test

question 86

Essay

A random sample of $n = 12$ observations is selected from a normal population to test $H _ { 0 } : \mu$ $= 22.1$ against $H _ { \mathrm { a } } : \mu > 22.1$ at $\alpha = .05$ . Specify the rejection region.