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Confidence Interval For Proportion Formula. The result is called a confidence interval for the population proportion p. The lowest value in the computed confidence interval is called the Lower Endpoint. We use this formula for a confidence interval for a proportion. Exact Clopper-Pearson Interval Type.
Confidence Interval p - z p1-p n where. If we want a confidence interval is 99 Alpha is 001. Confidence interval for a proportion. The largest value in the computed confidence interval is called the Upper Endpoint. Confidence interval formula for a proportion. 095 95 99 99 Confidence Interval for a Population Proportion A confidence interval is a statistical concept that has to do with an interval that is used for estimation purposes.
As described above we can calculate our standard deviation of the sampling distribution of the sample proportion σ of p we apply the z-table.
For 95 Confidence Interval 330 196 05 100 to 330 196 05 100. α 2 p p z pq n. We use this formula for a confidence interval for a proportion. The point estimate for the population proportion is the sample proportion and the margin of error is the product of the Z value for the desired confidence level eg Z196 for 95 confidence and the standard error of the point. 01 to 05 by 01 Annotated Output. Confidence Interval 322 to 338 Therefore the Confidence Interval at a 90 confidence level is 322 to 338.