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The researcher is not happy with the estimate, and she wants tighter interval, i.e., a smaller level of error. If she wants the estimate to

The researcher is not happy with the estimate, and she wants tighter interval, i.e., a smaller level of error. If she wants the estimate to be within $29 with 90% confidence, what sample size does she need? Sample size: (report the next whole number, 100.2 should be reported as 101)

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