A national sample of 2728 adults aged 18 and older surveyed, Ask an Expert

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A national sample of 2728 adults, aged 18 and older, surveyed over the telephone (using bother landlines and cell phones) revealed that 66% reported that they had given "quite a lot" of thought to the upcoming elections. Is there any evidence that the percentage has changed from the reported benchmark of 58% during the same timeframe before the previous election?

a) what is the null hypothesis? Find the z-score of the observed proportion calculate the value of the test statistic. z =

b. What is the alternative hypothesis? Compare the z-score to the critical valye for a = 0.001 significance level using two sided alternative. Find the critical value z* = compare the z-score to the critical value

c) Explain the conclusion. Has it failed to reject or rejected the null? Is there sufficient

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