Kids with cell phones: A marketing manager for a cell phone company claims that the percentage of children aged  8 - 12  who have cell phones differs from  50% . In a survey of  828  children aged  8 - 12  by a national consumers group,  422  of them had cell phones. Can you conclude that the manager's claim is true? Use the  =α0.01  level of significance and the  P -value method and Excel. Part 1 of 5     State the appropriate null and alternate hypotheses. H0 :  =p.50   H1 :  ≠p.50   This hypothesis test is a ▼two-tailed test.   Alternate Answer: H0 :  =p0.5 H1 :  ≠p0.5 This hypothesis test is a two-tailed test. Part 2 of 5     Compute the test statistic. Do not round intermediate steps. Round the answer to two decimal places. =z 0.56 Part: 2 / 5 2 of 5 Parts Complete   Part 3 of 5     Compute the  P -value. Round the answer to four decimal places. P -value =

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