The magazine Sports Illustrated asked a random sample of 750 Division 1 college athletes, "Do you believe performance-enhancing drugs are a
problem in college sports?" Suppose that 30% of all Division I athletes
think that these drugs are a problem. Let p be the sample proportion who
say that these drugs are a problem. The sampling distribution of p is
approximately Normal because
There are least 7570 Division I college athletes
np = 225 and n(1-P) = 525
a large sample size like n = 750 guarantees it
the sampling distribution of p always has this shape
a random sample was chosen

Like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.