a. A change is made that should improve student satisfaction with the parking situation at your school. Before the change, 37% of students approve of the parking that’s provided. The null hypothesis H₀: p̂ = 0.37 is tested against the alternative H_a: p̂ > 0.37.

b. A researcher suspects that the mean birth weights of babies whose mothers did not see a doctor before delivery is less than 3000 grams. The researcher states the hypotheses as

H₀: μ = 3000 grams

H_a: μ ≤ 2999 grams

Explain what’s wrong with the stated hypotheses. Then give correct hypotheses.