Calculating Power and Probability of Type II Error (Beta) Value in SPSS

[@remygooch1393]

This video gave me a better understanding of calculating a Type II error and allowed me to better understand the difference between alpha and beta errors.

[@Jimmi_sky]

Omg I also watch your crime videos so I got very disoriented when I started this video while working on my PhD proposal and heard “hello this is Dr Grande”… 🤣 crime, stats and psychology, that’s what I call a triple threat

[@vanibarb2229]

OHHHH big thanks!!!! Great explanation

[@AndrewMcNeillMusic]

Absolutely brilliant - thank you for a very helpful video

[@banderalmohayya]

Great video and very useful explanation always! Thank you, Dr. Grande.

[@DrGrande]

You're welcome, thanks for watching -

[@giselechiozigotardi3224]

Thank you for the video! However, I misunderstood the formula for calculating the Beta value. In the first example, n = 45, Alpha = 0.05, effect size = 0.233, and Power = 0.880 how did you find the value of 0.12 for Beta?

[@berkozdemir2420]

um you simply subtract power (0.88 in this case) from 1.
1 - 0.88 = 0.12 thus, beta.

[@iyaezebassey]

Dr Grande thank you so much, but this is for data with only one variable. What if I have to do a power analysis and interpret type II error for up to five variables in one study?

[@knockyyyy]

Can this same univariate procedure be used to look for power and Type II error with a t-test (only 2 groups)?

[@sreekanthr08]

Thanks

[@DrGrande]

You're welcome, thanks for watching -

[@gabypetrovic315]

Hi Dr Grande, is it possible to calculate power for unequal sample sizes in SPSS?

[@demijohnston5554]

How would you calculate a sample size from this?