A manager at a corporation believes that the percentage of email at his company that is a spam may be 80%.

A manager at a corporation believes that the percentage of email at his company that is a spam may be 80%.  He examines a random sample of 500 emails received at an email server and finds that 382 of the messages spam,  Perform a hypothesis test to determine whether the percentage of emails that are spam differs from 80% .  Use the 0.05 level of significance. Find the p-state value and state the conclusion.