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I know how to calculate the z critical value but I don't know how am I supposed to know what confidence interval to use. This

I know how to calculate the z critical value but I don't know how am I supposed to know what confidence interval to use. This question did not state. Please explain.

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orrect! Question 4 Use the following information for Questions 2 - 6: TV advertising agencies face increasing challenges in reaching audience members because viewing TV programs via digital streaming is gaining in popularity. The Harris poll reported on November 13, 2012, that 53% of 2343 American adults surveyed said they have watched digitally streamed TV programming on some type of device. Question 4: What is the 2 critical value

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