Is the mean age at which children in Europe can first read now under 4 years? If the population of all children in Europe has a mean age of μ years until they begin to read, one would test which of the following null and alternative hypotheses to answer this question?
Options:
H0: μ = 4 vs. Ha: μ = 4 ± the sample mean, assuming our sample size is n
H0: μ = 4 vs. Ha: μ ≠ 4
H0: μ = 4 vs. Ha: μ > 4
H0: μ = 4 vs. Ha: μ < 4