Probability Of Sample Proportion Calculator. Sample proportion strays less from population proportion 06 when the sample is larger. The calculator also provides a table of confidence intervals for various confidence levels.
Briefly a confidence interval is a way of estimating a population parameter that provides an interval of the parameter rather than a. Note that this sample size calculation uses the Normal approximation to the Binomial distribution. Next determine the same size.
If the sample proportion is close to 0 or 1 then this approximation is not valid and you need to consider an alternative sample size calculation method.
If you enter a probability as a percentage be sure to include the percent sign after the number. Assuming the retailers claim is true find the probability that a sample of size 121 would produce a sample proportion so low as was observed in this. Use this calculator to compute probabilities associated to the sampling distribution of the sample proportion. If the sample proportion is close to 0 or 1 then this approximation is not valid and you need to consider an alternative sample size calculation method.
