(Solved): Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system manage ...

Spam: A researcher reported that

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

. He examines a random sample of 500 emails recelved at an email server, and finds that 369 of the messages are spam. Can you conclude that less than

of emails are spam? Use both

and

levels of significance and the

-value method and Excel. Part:

Part 1 of 5 (a) State the appropriate null and alternate hypotheses.

:

:

? This hypothesis test is a

test.