Using correct effect size/calculate sample size in G power

Frequently asked questions about PLS path modeling.
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mmzouki
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Joined: Mon Oct 08, 2018 8:27 pm
Real name and title: Mathew Zouki, Student

Using correct effect size/calculate sample size in G power

Post by mmzouki » Mon Oct 08, 2018 8:42 pm

Hello,
I currently am working on an assignment where I need to record the effect size and sample size of 4 predictive variables. It must be done using t-test with the information given (see attachment). I am not sure if I need any of that information to calculate effort size and sample size in G power. Do i just put the effect size at 0.15, use a multiple regression model, a err prob of 0.05 and a power of 0..95 and see what the sample size is based on that for all variables? Someone please help.
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jmbecker
SmartPLS Developer
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Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

Re: Using correct effect size/calculate sample size in G power

Post by jmbecker » Fri Oct 12, 2018 8:47 am

First, you need to think which is the correct test for your example. Do you want to test mean differences? Or what do you want to test?
Dr. Jan-Michael Becker, University of Cologne, SmartPLS Developer
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