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Spam: A researcher reported that 71.8% of all email sent in a recent month was spam....

Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system manager at a large corporation believes that the percentage at his company may be 70%. He examines a random sample of 500 emails received at an email server, and finds that 373of the messages are spam. Can you conclude that greater than 70% of emails are spam? Use both α=0.10 and α=0.01 levels of significance and the critical value method with the table.

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