Please HELP....If np5 and nq5 estimate P (more than 9) with n=12 and p=0.7 by using the normal distribution as an approximation to the binomial distribution if np

Question

Please HELP....If np>5 and nq>5 estimate P (more than 9) with n=12 and p=0.7 by using the normal distribution as an approximation to the binomial distribution if np <5 or nq<5 then state the normal approximation is not suitable

anonymous · Answer

hint: read the book :D

andijo76 · Answer

q=1-p 
-1-0.7
-0.6 
np-12*0.7=8.4 
nq= 13*0.6= 7.2 
np=5.2 
nq=7.8
μ=np
=12*0.7 =8.4
13∗0.4∗0.6−−−−−−−−−−√
=2.244
x=5-0.5 
=4.5 
x-u/o =(5-0.5)/-6=2.244
=0.6684
P(z<-0.6884)=

andijo76 · Answer

now i am stuck

andijo76 · Answer

i figured it out  at least i hope i am right lol