Dependent Sample t-Test: Power Calculation Parameters - Quick Tab

Select the Quick tab of the Dependent Sample t-Test: Power Calculation Parameters dialog box to access options to establish the basic parameters for analyzing power for the dependent sample t-test.

Fixed Parameters

The entries in the boxes under Fixed Parameters establish the values for the fixed parameters in the power calculation.

Mu1

In the Mu1 box, enter the mean for the statistical population from which the first set of measurements was sampled.

Mu2

In the Mu2 box, enter the mean for the statistical population from which the second set of measurements was sampled.

N

In the N box, enter the sample size for the analysis, i.e., the number of pairs of observations.

Alpha.  In the Alpha box, enter the Type I error rate used in determining the critical value for the t-statistic.

Sigma1

In the Sigma1 box, enter the population standard deviation for the first population sampled from in the analysis.

Sigma2

In the Sigma2 box, enter the population standard deviation for the second population sampled from in the analysis.

Rho.  In the Rho box, enter the correlation between the two measurements.  

Type of Hypothesis

Use the option buttons under Type of Hypothesis determines the type of null hypothesis tested by the t-statistic.

2-tailed (Mu1 = Mu2)

Select the 2-tailed (Mu1 = Mu2) option button to use null and alternative hypotheses of the form

H₀: μ₁= μ₂ H₁: μ₁≠μ₂

1-tailed (Mu1 <= Mu2)

Select the 1-tailed (Mu1 <= Mu2) option button to use null and alternative hypotheses of the form

H₀: μ₁ &le; m₂ H₁: μ₁ > μ₂

1-tailed (Mu1 >= Mu2)

Select the 1-tailed (Mu1 >= Mu2) option button to use null and alternative hypotheses of the form

H₀: μ₁≥μ₂ H₁: μ₁ < μ₂