Understanding and Calculating Power after Two-Way ANOVA using SPSS

This video demonstrates how to understand and calculate statistical power after a two-way ANOVA using SPSS. Statistical power is the percentage chance that the null hypothesis will be rejected, when in reality, the null hypothesis is false. Statistical power is partially based on the effect size of the population, and in this example only the effect size from the sample is available. Caution should be used when interpreting “observed power” based on a sample effect size. The concepts of true positive, true negative, false positive, and false negative are reviewed. The relationship between the probability of a type II error (beta error) and power is reviewed. Alpha error (type I error) is discussed.

[amandavalentino]

Dr. Grande- This video helped me recall SPSS when used in undergrad. Thank you for making it clearer and easier to understand as it this program is often needed.

[jackiedeleonardis]

Thank you for the detailed breakdown of calculating statistical power and understanding the null hypothesis. This video was very helpful in providing an understanding of true positives/negatives and false positives/negatives, which were unclear to me prior to watching the video.

[wardellwhittaker]

I have never used SPSS before. To me, it operates and looks like an excel spreadsheet. Watching this video and listening to all the terms being used helped me to know what I need to catch up on because statistics was a long time ago. I will definitely be checking out other videos looking for clarity.

[rhondabaileyyy]

It was been a while since I have had a research program. This video was very detailed. I liked how he walks us through step by step on how to use it.

[laurynmoffa]

Thank you, Dr. Grande! This video helped refresh my memory regarding null true positive, true negative, false positive, and false negative outcomes.

[brandiependergast]

This program is completely new to me. I look forward to taking advantage of the program and implementing all this video has demonstrated. It contained a lot of information and seems a bit confusing at first view. I am confident with the program in front of me to actually use it hands on, it will be extremely helpful.

[marissabarnes]

Thank you for this detailed visual explanation of how to calculate statistical power. I had struggled with this concept in undergrad, but I now have a better understanding of how to approach and understand these findings.

[JamieB]

This video refreshes my memory on using spss to determine whether or not to reject the null hypothesis.

[jillbeck]

A confusing as they are statistics are fascinating. There is so much information in this video and it accomplishes it's goal of teaching how to read and use this program. How wonderful that this program does all of the math and presents it in an easy to read format.

[tyonnabrooks]

I haven't used SPSS in 6 years. This video was helpful with informing me of the details, such as the meaning of p and significance being under .005.

[angelinastanton]

This video refreshed my memory on terms, such as the null hypothesis, true and false negatives or positives. It seemed confusing and it was difficult for me to follow along with the explanations. As long as I stick to the formulas, it will become easier to practice sorting through data. I did not know that power is the probability that we will reject the null hypothesis, when the null hypothesis is false. I thought it was easier to understand that probability is finding a true positive and detecting an actual difference. I have never used this software before, and I was not aware of this software. I think it is very helpful for research and calculating statistics.

[kristiewatunya]

This detailed video of understanding statistical power and what a null hypothesis is, has been helpful when reading my statistical literature review. I can understand how the variables in treatment outcomes are impacted by other variables such as length of treatment or the type of treatment utilized. Thank you for this video.

[remygooch]

This video gives me a better understanding of utilizing SPSS as well as understanding the null hypothesis along with true/false positives and negatives.

[deniseswindell]

Dr Grande,
I found some of this video to be a reminder of previous research classes such as true and false positives and concluding whether the null hypothesis would be rejected or accepted. I do feel watching this video playlist will be helpful when reading research and having a better understanding of what I am reading.

[virginiamurrey]

This video enlightened me on the concept of power and how it relates to the applied data. This information is new to me and was very easy to understand through visuals and explanations

[briannacocuzzo]

Dr Grande, do you have a video for an accuracy calculation? Your videos are soooo helpful!

[RyanPclifton]

although i find statistics and the terminology used in statistics to be confusing, this was an informative and helpful breakdown of calculating statistical power and the differences of the effects that the 2 independent variables may have on the dependent. I may need to watch the video a few more times to firmly grasp how to get this information properly through SPSS. But i am confident that with practice, it will become easier and I will be more confident in using the program.

[ashrafulalam]

Thank you very Much Sir ! Just one request. I'd be more helpful if you provide the corresponding datasets in the description .
Love from Bangladesh.

[tamarabakergibbons]

Thank you Dr.Grande for the video. The false/true positives vs. the false/true negatives use to confuse me a great deal in previous stat classes! I am still a bit confused. However, I did find the tutorial to be helpful. I was able to follow along easily. What happens when the probably of rejecting the null is high but you know the results should be different?

[joseliz]

Dr. Grande, thank you for posting this video. Although, I havent in-depthly used SPSS, this is a good reference guide, should i come across a TWO-WAY ANOVA