QUESTION 11 Last year, the results of a survey at one college suggested that 28% of students smoked regularly. This year, after an intensive college-wide anti-smoking campaign, a researcher wishes to investigate whether the proportion of smokers has changed. Let p represent the proportion of students who smoke regularly today. State hypotheses for a significance test, letting the alternative hypothesis reflect the possibility that the proportion of students who smoke today is smaller from the proportion last year. Do you need to conduct a one-sided or a two-sided test? O a. two-sided O b. one-sided