:2. In a simple random sample of 900 students at a state
university, only 180 favor a return to the quarter system.  A 95%
confidence interval for the percentage of students favoring a
return to the quarter system has a lower endpoint closest to <p>

a.  18.7%
 b.  17.4%
 c.  10%
 d.  19.6%
 e.   8% <p>