A Statistics Project
Callini47
sample_sizes.xlsSampleSize
| Sample Size Determination for Proportion | |||||
| Estimate of True Proportion* = | 0.50 | ||||
| Sampling Error = | 0.05 | ||||
| Confidence Level = | 95.00% | Sample Size Needed = | 385 | ||
| Z Value | -1.9599639845 | ||||
| Calculated Sample Size | 384.1458820694 | ||||
| Finite Population Size = | 500 | Sample Size Needed = | 218 | ||
| Calculated Sample Size | 217.4872180626 | ||||
| *Use .50 for the "estimate of true proportion" when unknown. | |||||
| Sample Size Determination for Mean | |||||
| Population Standard Deviation = | 100 | ||||
| Sampling Error = | 25 | ||||
| Confidence Level = | 95.00% | Sample Size Needed = | 62 | ||
| Z Value | -1.9599639845 | ||||
| Calculated Sample Size | 61.4633411311 | ||||
| Finite Population Size = | 500 | Sample Size Needed = | 55 | ||
| Sample Size with FPC | 54.8326149281 | ||||
| ©2007 DrJimMirabella.com |
Use .50 for the "estimate of true proportion" when unknown.
Use this if the population size is known. It will not impact the results unless it is relatively small.
Use this if the population size is known. It will not impact the results unless it is relatively small.
This is the minimal sample needed to assure the resulting confidence interval will be no larger than the sampling error.
This is the minimal sample needed to assure the resulting confidence interval will be no larger than the sampling error.
Input the maximum size of the confidence interval; in other words, you want to be X% confident that the true population proportion deviates from the sample proportion by no more than this.
Input the maximum size of the confidence interval; in other words, you want to be X% confident that the true mean deviates from the sample mean by no more than this.
Input the level of confidence that you want to assure the population mean deviates by no more than the sampling error.
Input the level of confidence that you want to assure the population proportion deviates by no more than the sampling error.
