Question 1083991: According to a government study,15% of all children live in a household that has an income below the poverty level. If a random sample of 20 children is selected:
what is the probability that 5 or more live in poverty?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! Probability of greater than 4, or 5 or more, is 0.170 from the table.
Do probability 5 which from the calculator is 2nd VARS 0, binompdf
input (20,.15,5) and that is the probability of exactly 5
0.1028
now do 6 (20,.15,6)=0.0454
now 7: 0.0160
and 8: 0.0046
and 9: 0.0011
and 10: 0.0002
The rest are insignificant
Add those: 0.1701
Alternatively do 0,1,2,3,4 and subtract from 1.
Using the table for 20 and say 0.2, one can look at the specific probability of a number and a cumulative probability for all the numbers up to and including that one. If one works on the calculator and looks at the table, this can be clarified.
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