Is the mean height for all adult American males between the ages of 18 and 21 now over 6 feet? If the population of all adult American males between the ages of 18 and 21 has mean height of μ feet and standard deviation σ feet, which of the following null and alternative hypotheses would one test to answer this question?
A) H 0 : μ = 6 versus H a : μ = 6 ± m
B) H 0 : μ ≤ 6 versus H a : μ > 6
C) H 0 : μ ≥ 6 versus H a : μ < 6
D) H 0 : μ = 6 versus H a : μ ≠ 6
