Is the mean age at which American children can first read now under 4 years? If the population of all American children has mean age of μ years until they begin to read and standard deviation σ years, one would test which of the following null and alternative hypotheses to research this?
A. H0: μ = 4 and Ha: μ ≠ 4
B. H0: μ = 4 and Ha: μ > 4
C. H0: μ = 4 and Ha: μ < 4
D. H0: μ = 4 and Ha: μ = 4 ± , assuming our sample size is n
A. H0: μ = 4 and Ha: μ ≠ 4
B. H0: μ = 4 and Ha: μ > 4
C. H0: μ = 4 and Ha: μ < 4
D. H0: μ = 4 and Ha: μ = 4 ± , assuming our sample size is n
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Answer to the question is CHOICE (C)
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All of the above