previously, 5% of mothers smoked more than 21 cigarettes during their pregnancy. an obstetrician believes that the percentage of mothers who smoke 21 cigarettes or more is less than 5% today. she randomly selects 115 pregnant mothers and finds that 2 of them smoked 21 or more cigarettes during pregnancy. test the researcher's statement at the alpha equals 0.1 level of significance. what are the null and alternative hypotheses? upper h 0: p equals 0.05 versus upper h 1: p less than 0.05 (type integers or decimals. do not round.) because np 0 (1 minus p 0 )equals nothing ▼ 10, the normal model ▼ be used to approximate the p-value.