Does secondhand smoke increase the risk of a low weight birth? a baby is “low birth weight” if it weighs less than 5.5 pounds at birth. according to the national center of health statistics, about 7.8% of all babies born in the u. s. are categorized as low birth weight. researchers randomly select 1200 babies whose mothers had extensive exposure to secondhand smoke during pregnancy. 10.4% of the sample are categorized as low birth weight. which of the following are the appropriate null and alternative hypotheses for this research question. h 0 : p = 0.078; h a : p ≠ 0.078 h 0 : p = 0.078; h a : p > 0.078 h 0 : p = 0.104; h a : p ≠ 0.104 h 0 : μ = 0.104; h a : μ > 0.104