SOLUTION: I can't figure out how to get the p-value. Question: 400 people are asked a question in a poll and 80 said yes. What is the P-value? I will be grateful for help, thank you.

Question 545383: I can't figure out how to get the p-value.
Question:
400 people are asked a question in a poll and 80 said yes. What is the P-value?
I will be grateful for help, thank you.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
400 people are asked a question in a poll and 80 said yes.
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sample proportion = p-hat = 80/400 = 1/5
test statistic = ((1/5)-p)/sqrt[p*q/n] = ?
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What is the P-value?
The p-value is the probability that z is less than (or greater than)
the test statistic. You don't have enough information to calculate
a p-value
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Cheers,
Stan H.
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