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This confidence interval is valid because a sample size of more than 30 was used. This confidence interval is not valid because the quantity npis

This confidence interval is valid because a sample size of more than 30 was used.

This confidence interval is not valid because the quantity npis too small.

This confidence interval is valid because each area resident was asked the same question.

The confidence interval is valid because no conditions are required for constructing a large-sample confidence interval for a proportion.

This confidence interval is not valid because "no opinion" was included as a response category for the question.

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