Sample Size Calculation, Two Means, t-Test, Dependent Samples
Sample size calculation for dependent samples t-tests with option for charts of sample size (number of sample pairs) vs. standardized effect size, sample size vs. and alpha level, and sample size vs. power
General
Element Name | Description |
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Power Goal | Specifies Power Goal for the Sample Size calculation (Acceptable range 0.65 to 0.999). |
Mu1 | Population number one mean. |
Mu2 | Population number two mean. |
Sigma1 | Population 1 standard deviation. |
Sigma2 | Population 2 standard deviation. |
Rho | Coefficient of correlation between the two populations of measurements (Acceptable range -0.9999 to 0.9999). |
Alpha Level | Alpha level (Type I error rate for t-statistic) (Acceptable range 0.0001 to 0.25). |
Hypothesis type | Hypothesis type selection: Two-tailed (Mu1=Mu2, population one mean=population two mean); One-tailed (Mu1<=Mu2, population one mean <= population two mean); One-tailed (Mu1>=Mu2, population one mean >= population two mean). |
Detail of computed results reported | Output level of detail selection: Sample Size Calculation produces Sample Size Calculation Spreadsheet; Smpl Size Calc plus Charts option produces, in addition, Sample Size Vs Standardized Effect chart, Sample Size Vs Alpha Level chart, Sample Size Vs Power chart. |
Chart Parameters
Element Name | Description |
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Number of Steps. (For charts only) | Number of individual steps for which to calculate sample size between the starting and ending parameter values for Sample Size Charts (Min 4, Max 100). |
Starting Power. (For charts only) | Initial power value for calculation of Sample Size Vs Power chart. (Acceptable range 0.05 to 0.99). |
Ending Power. (For charts only) | Final power value for calculation of Sample Size Vs Power chart. (Acceptable range 0.1 to 0.999). |
Starting Standardized Effect. (For charts only) | Initial standardized effect size for calculation of Sample Size Vs Standardized Effect chart. (Acceptable range -10 to 9). |
Ending Standardized Effect. (For charts only) | Final standardized effect size for calculation of Sample Size Vs Standardized Effect chart. (Acceptable range -9 to 10). |
Starting Alpha Level. (For charts only) | Initial alpha level for calculation of Sample Size Vs Alpha Level chart. (Acceptable range 0.0001 to 0.2499). |
Ending Alpha Level. (For charts only) | Final alpha level for calculation of Sample Size Vs Alpha Level chart. (Acceptable range 0.0002 to 0.25). |
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