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Is the mean height for all adult American males between the ages of 18 and 21...

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?
H0: μ = 6 versus Ha: μ ≠ 6
H0: μ = 6 versus Ha: μ = 6 ± m
H0: μ ≥ 6 versus Ha: μ < 6
H0: μ ≤ 6 versus Ha: μ > 6
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Answer #1

Solution :

This is the right tailed test .

The null and alternative hypothesis is ,

H0 :   6

Ha : > 6

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