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 60%. In a survey of 824 children aged 8-12 by a national consumers group, 453 of them had cell phones. Can you conclude that the manager's claim is true? Use the ? = 0.05 level of significance and the critical value method with the table. Part 1 of 5 State the appropriate null and alternate hypotheses. H0: H1: This hypothesis test is a (Choose one) test.
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Alternative hypothesis: The percentage of children aged 8-12 who have cell phones is different from 60%. Symbolically, we can write: H0: p = 0.6 Ha: p ≠ 0.6 where p is the true proportion of children aged 8-12 who have cell phones in the population. Show more…
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A poll of 2,003 randomly selected adults showed that 95% of them own cell phones. The technology display below results from a test of the claim that 93% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution and assume a 0.01 significance level to complete parts (a) through (e): Test of p = 0.93 vs p ≠ 0.93 Sample: 1900 out of 2,003 Sample P: 0.948577 95% Confidence Interval: (0.935866, 0.961288) Z-Value: 3.26 P-Value: 0.001 What is the null hypothesis and what do you conclude about it? Identify the null hypothesis: Ho: p = 0.93 Choose the correct answer below: A. Reject the null hypothesis because the P-value is less than or equal to the significance level, Α.
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