Last year, 20 percent of all teenagers purchased a new iPhone. This year, a sample of 260 randomly chosen teenagers showed that 39 had purchased a new iPhone. What is the conclusion of the hypothesis test that the percentage has decreased if the significance level is 0.05
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Step 1
- Null hypothesis \( H_0 \): The proportion of teenagers purchasing a new iPhone has not decreased, \( p = 0.20 \). - Alternative hypothesis \( H_a \): The proportion of teenagers purchasing a new iPhone has decreased, \( p < 0.20 \). Show more…
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Last year, 20 percent of all teenagers purchased a new iPhone. This year, a sample of 260 randomly chosen teenagers showed that 39 had purchased a new iPhone. What is the conclusion of the hypothesis test that the percentage has decreased if the significance level is 0.05? Reject H0: The percentage has decreased Accept H0: The percentage has decreased Reject H0: The percentage has not decreased Accept H0: The percentage has not decreased
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Last year, 20 percent of all teenagers purchased a new iPhone. This year, a sample of 260 randomly chosen teenagers showed that 39 had purchased a new iPhone. To test whether the percentage has decreased, the test statistic is:
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Last year, 20 percent of all teenagers purchased a new iPhone. This year, a sample of 260 randomly chosen teenagers showed that 39 had purchased a new iPhone. To test whether the percentage has decreased, the critical value at α = .05 is:
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