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 be78

%

.He examines a random sample of500

emails received at an email server, and finds that370

of the messages are spam. Can you conclude that less than78

%

of emails are spam? Use both=

0.01

and=

0.05

levels of significance and the critical value method with the table.

Part:0 / 5

0 of 5 Parts Complete

Part 1 of 5

State the appropriate null and alternate hypotheses.

H

0

:

H

1

:

This hypothesis test is a

(Choose one)

test.