Question: Use the following sample information to calculate the confidence interval to estimate the population proportion. Let x be the number of items in the sample having the characteristic of interest.

1. n = 116 and x = 57, with 99% confidence
2. n = 800 and x = 479, with 79% confidence
3. n = 240 and x = 106, with 85% confidence
4. n = 60 and x = 21, with 90% confidence

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