It is known that 15% of all college freshmen at Ivey University leave after their first year.Calculate the interval that contains 99.73% of the students who remain if we are looking at a random sample of 300 Ivey University freshmen.
A)[236.45 273.55]
B)[26.45 63.55]
C)[110.25 369.75]
D)[38.82 51.18]

Question

Quizplus · Accepted Answer

Using the normal approximation to the binomial distribution, the interval is calculated as 0.85*300 ± 3*sqrt(0.85*0.15*300).

It Is Known That 15% of All College Freshmen at Ivey