T 10 05 2 Population Sample Size Calculations

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T 10 -05 2 Population Sample Size Calculations Purpose Allows the analyst to analyze

T 10 -05 2 Population Sample Size Calculations Purpose Allows the analyst to analyze the sample size necessary to conduct "statistically significant" testing for sample mean and proportion situations for a 1 -a confidence level and "allowable error". Inputs Confidence level Margin of error Population/Sample standard deviation (s/s) Outputs Sample size 1

Determining How Many Samples to Take (Means) Margin of Error - 3 sd Sample

Determining How Many Samples to Take (Means) Margin of Error - 3 sd Sample Size Calculation -2 sd -1 sd + 2 sd + 3 sd Level of Confidence Depends on the level of confidence (1 a)? 2

Determining How Many Samples to Take (Proportions) Margin of Error - 3 sd Sample

Determining How Many Samples to Take (Proportions) Margin of Error - 3 sd Sample Size Proportions -2 sd -1 sd + 2 sd + 3 sd Level of Confidence Depends on the level of confidence (1 a)? 3

Sample Size for Mean - Example Calculate the sample size necessary to ensure that

Sample Size for Mean - Example Calculate the sample size necessary to ensure that you are 95% confident that the error in the “difference of 2 populations” is within 2 of the population mean when population 1 standard deviation is 6. 82 and population 2 standard deviation is 5. 83. 4

Input the confidence level (. XX for XX%), Std Dev for both populations, and

Input the confidence level (. XX for XX%), Std Dev for both populations, and Margin of Error. The Sample Size necessary to achieve this accuracy is automatically calculated. 5

Sample Size for Proportion - Example Calculate the sample size necessary to ensure that

Sample Size for Proportion - Example Calculate the sample size necessary to ensure that you are 95% confident that the error in the “difference of 2 populations” is within 1% (. 01) of the population proportion when population 1 proportion estimate is. 96 and population 2 proportion estimate is. 83. 6

Input the confidence level (. XX for XX%), proportion estimate for both populations, and

Input the confidence level (. XX for XX%), proportion estimate for both populations, and Margin of Error (. XX for XX%). The Sample Size necessary to achieve this accuracy is automatically calculated. 7

Sample size Sample size calculations Outcome or exposureSample size Sample size calculations Outcome or exposure
Population vs Sample Population Sample population In statisticsPopulation vs Sample Population Sample population In statistics
Statistical Power And Sample Size Calculations Minitab calculationsStatistical Power And Sample Size Calculations Minitab calculations
Statistical Power And Sample Size Calculations Minitab calculationsStatistical Power And Sample Size Calculations Minitab calculations
Size 8 Size 10 Size 12 Size 14Size 8 Size 10 Size 12 Size 14
Sample Size Determination Determining Sample Size for ProbabilitySample Size Determination Determining Sample Size for Probability