Kids with cell phones:A marketing manager for a cell phone company claims that less than

58%

of children aged

8

-

12

have cell phones. In a survey of

820

children aged

8

-

12

by a national consumers group,

443

of them had cell phones. Can you conclude that the manager's claim is true? Use the

=0.10

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

Part 1 of 5

State the appropriate null and alternate hypotheses.

H0

:

=p.58

H1

:

<p.58

This hypothesis test is a left-tailed test.

Part 2 of 5

Find thecritical value.Round the answer to three decimal places.

For

=0.10

,the critical value is

1.282

.

Part:2 / 5

2 of 5 Parts Complete

Part 3 of 5

Compute the test statistic. Do not round intermediate calculations. Round the answer to two decimal places.

=z