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 be71

%

.He examines a random sample of500

emails received at an email server, and finds that377

of the messages are spam. Can you conclude that greater than71

%

of emails are spam? Use both=

0.10

and=

0.01

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

Part 1 of 5

Your Answer is correct

State the appropriate null and alternate hypotheses.

H

0

:=

p

0.71

H

1

:>

p

0.71

This hypothesis test is a

right-tailed

test.

Part:1 / 5

1 of 5 Parts Complete

Part 2 of 5

Find the critical values. Round the answers to three decimal places.

For=

0.10

,the critical value is

.

For=

0.01

,the critical value is

.