Classwork Assignment Chapter 5.xlsx - Binomial Ditribution...

Binomial Ditribution
Page 276, #33
Consider a binomial experiment with n=20 and p=-.70
Compute
a. f(12) 0.114397
b. f(16) 0.130421
c. P(x<=15) 0.762492
d. P(x>=16) 0.237508
e. E(x) 14
f. Variance 4.2
St.Dev 2.04939

a. f(12) 0.1143967
b. f(16) 0.130421
c. P(x<=15 0.7624922
d. P(x>=16 0.2375078
e. E(x) 14
f. Variance 4.2
St.Dev 2.0493902

Page 277, #41
A university found that 20% of its
statistics course. Assume that 20
p=0.2
n=20
a. P(x<=2)
0.206085
b. P(x=4)
0.218199
c. P(x>3) = 1 - P(X<=3)
0.588551
d. E(x) = n*p
4

s students withdraw without completing the introductory
students registered for the course.
a. Compute the probability that 2 or fewer will withd
b. Compute the probability that exactly 4 will withdra
c. Compute the probability that more than 3 wil with
d. Compute the expected number of withdrawals

draw.
aw.
hdraw.

p=0.2
n=20
a. P(x<=2) 0.20608
b. P(x=4) 0.2182
c. P(x>3) = 1 - P(X<=3) 0.58855
d. E(x) = n*p 4

p 0.42

n 18
p 0.42
x p(x)