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95 Confidence Interval Calculator Proportion. Write the confidence level as a decimal. Wikipedia has an article here. Answers will appear in. The Wilson score interval supports a better result than the normal approximation interval especially for small samples and for edge proportions near 0 or 1.
Upper Limit Proportion Margin of Error 08333 02109 10442. The confidence interval for proportions is calculated based on the mean and standard deviation of the sample distribution of a proportion. Fill in the sample size n the number of successes x and the confidence level CL then hit Calculate. Number of favorable cases. The Wilson score interval supports a better result than the normal approximation interval especially for small samples and for edge proportions near 0 or 1. Enter parameters in the green cells.
Hence you can be 95 sure that the observed 310 does notcontradict theory.
If you try this with 3-out-of-10 as in the experiment above you will find that the theoretical answer 05 lies within either of the 95-percent confidence intervals. Use this step-by-step Confidence Interval for Proportion Calculator by providing the sample data in the form below. Answers will appear in. All you need to know about Proportion Confidence Intervals. Write the confidence level as a decimal. What is the 95 Proportion Confidence Interval of your sample of students that have seen Titanic with x20 favorable replies and sample size n30.