SOLUTION: 12. It is given that 40% of the population support the birthday party. One hundred and fifty members of the population are selected at random. Use a suitable approximation to find

Question 1190828: 12. It is given that 40% of the population support the birthday party. One hundred and fifty members of the population are selected at random. Use a suitable approximation to find the probability that more than 55 out of the 150 support the birthday party.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
normal approximation
mean=np=150*0.40=60
variance=np(1-p)=60*0.6=36
sd=sqrt(V)=6
z>(55.5-60)/6, using continuity confutation factor.
z>-0.75
probability is 0.7733

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