SOLUTION: Sixty five percent of 12th graders attend school in a particular urban district. If a sample of 450 12th grade children is selected. Find the probability that at least 290 are actu
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Question 1044388: Sixty five percent of 12th graders attend school in a particular urban district. If a sample of 450 12th grade children is selected. Find the probability that at least 290 are actually enrolled in the school. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The point estimate is 0.65*450=292.5
The standard error is sqrt {(p)(1-p)/n}
sqrt {0.65*0.35/450)}=sqrt(102.3750)=10.12
z=(290-292.5)/10.12=-0.247
Want P (z>-0.247)=0.5975
