Use 1 Proportion to estimate a binomial population proportion and to compare the proportion to a target value or a reference value. Using this test, you can do the following:

- Determine whether the population proportion differs from the hypothesized proportion that you specify.
- Calculate a range of values that is likely to include the population proportion.

For example, a marketing analyst wants to determine whether mailed advertisements that were sent to a random sample of households result in a response rate that is different from the national average of 6.5% (target value). If the proportion differs from the target value, the analyst can use the confidence interval to determine whether the difference is practically significant.

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