17.9.3.1 The (PSS) Paired-Sample t-Test Dialog Box

Supporting Information

• Introduction to (PSS) Paired-Sample t-Test
• Algorithms: (PSS) Paired-Sample t-Test
• Tutorial on (PSS) Paired-Sample t-Test

Results Log Output

Select check box to output results to the Results Log.

Calculate

Power	Compute power for specified sample size.
Sample Size	Compute sample size for proposed power including actual power.

Test Specification

1st Group Mean	Mean of Group 1.
2nd Group Mean	Mean of Group 2.
Std Dev of Diff	Standard deviation of the differences for paired samples.
Alpha	Probability of rejecting the null hypothesis when it is true.
Hypothetical Power(s)	Specify space-separated list of hypothetical power(s). Only available when sample size is calculated.
Hypothetical Sample Size(s)	Specify spaced separated list of hypothetical sample size(s). Only available when power is calculated. The number entered is the sample size for each set of paired samples.
Alternative Hypothesis	Select a Alternative Hypothesis for two-sample t-test Not Equal Perform a 2-sided test for tail. Used to test 1st Group Mean is significantly different from 2nd Group Mean . Greater than Perform a right-tailed test. (When Calculate is set to Sample Size, 1st Group Mean should be greater than 2nd Group Mean for a Greater than Alternative Hypothesis.) Less than Perform a left-tailed test. (When Calculate is set to Sample Size, 1st Group Mean should be less than 2nd Group Mean for a Less than Alternative Hypothesis.)

Options

Controls to be used when supplying additional power or sample size values by worksheet dataset:

When calculating power (Calculate = Power):

More Hypothetical Sample Size(s)	Select to activate the Hypothetical Sample Size(s) Column input controls.
Hypothetical Sample Size(s) Column	Specify column of sample size values. Available when More Hypothetical Sample Size(s)... is selected.

When calculating sample size (Calculate = Sample Size):

More Hypothetical Power(s)	Select to activate the Hypothetical Power(s) Column input controls.
Hypothetical Power(s) Column	Specify column of power values. Available when More Hypothetical Power(s)... is selected.

Power Curve

Specify whether to output the Power Curve for the t-Test. In this graph, X is Difference and Y is Power.

Output Results

Determine where to create the output report worksheet. For more information, see Analysis Report Sheets.

Output Plot Data

Specify where to output worksheet with the data of power curves.