One Ivy League University has found that 40% of its students withdraw without completing the intro statistic course. Assume thst 15 students have registered for the course this semester, find the probability that
a. three or fewer will withdraw
b. exactly five will withdraw
c. what is the means and standard deviations for the number of students withdrawing from that course.
I'm just not sure if my answers are right!! I need feedback...
Table A-1
Answer a: n=15 x=3,2,1,0 p=.40 q=.60
x p(x)
3 .063
2 .022
1 .005
0 .0005
add them up =.0905

answer b:
n=15 x=5 p=.4 q=.6
x p(x)
5 .186

answer c:
n=15
p=.40
q=.6
means=6
varience=3.6
s.d.=1.9

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