Spam: A researcher reported that 71.8% of all email sent in

Last updated: 7/14/2022

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 78%. He examines a random sample of 500 emails received at an email server, and finds that 370 of the messages are spam. Can you a= 0.05 levels of significance and the critical value method with the table. 78% conclude that less than of emails are spam? Use both a 0.01 and Part 1 of 5 State the appropriate null and alternate hypotheses. Ho: p= 0.78 H₁: p< 0.78 This hypothesis test is a left-tailed Part: 1 / 5 Part 2 of 5 test. Find the critical values. Round the answers to three decimal places. For a= 0.01, the critical value is For a= 0.05, the critical value is X 5