t-Test for Zero Correlation: Power Calculation Parameters - Quick Tab
Select the Quick tab of the t-Test for Zero Correlation: Power Calculation Parameters dialog box to access options to establish the basic parameters for analyzing power for the t-test for zero correlation.
- Fixed Parameters
- The entries in the boxes under Fixed Parameters establish the fixed, or baseline, parameters for subsequent power calculations and graphs. Parameters that are not varied explicitly as the dependent (X-axis) variables in a graphical analysis will be set equal to these values.
- Rho
- In the Rho box, enter the actual value of the population correlation (ρ).
- N
- In the N box, enter the sample size (N) for the analysis.
- Alpha
- In the Alpha box, enter the type I error rate (α) used in determining the critical value for the t-statistic.
- Type of Hypothesis
- Use the option buttons under Type of Hypothesis to determine the type of null hypothesis tested by the t-statistic.
- 2-tailed (Rho = 0)
- Select the 2-tailed (Rho = 0) option button to use null and alternative hypotheses of the form
H0: r = 0 H1: r ¹ 0
- 1-tailed (Rho <= 0)
- Select the 1-tailed (Rho <= 0) option button to use null and alternative hypotheses of the form
H0: r ≤ 0 H1: r > 0
1-tailed (Rho >= 0). Select the 1-tailed (Rho >= 0) option button to use null and alternative hypotheses of the form
H0: r ³ 0 H1: r < 0
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