Statistics 101: F-ratio Test for Two Equal Variances
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- Опубліковано 25 лип 2024
- In this video, we learn how to use the F-ratio and F-distribution to test the assumption that two population variances are equal. We learn the conceptual background and then do an example problem. Oftentimes quality assurance professionals or other analysts wish to test whether or not two population variances are equal. Since sampling error is involved, the ratio of the two sample variances will fall over a range in the F-distribution. The samples will most likely be different, but is the difference significant? Let's find out.
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Liked within one minute lol sometimes a supportive message is nice to hear.
8 years later, you're still saving lives-
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I was having a hard time conveying F-ratio Test to a student. He informed me this was helpful. I just wanted to say thanks for the great video!
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Hello! Thank you for watching. Actually all of my videos are organized into sequential topics and then within each playlist also on my channel page. UA-cam does a terrible job letting you know what you are watching is part of an overall playlist. Click "Videos" under my name and then change "Uploads" to "Playlists" Let me know if you cannot locate them. Best, B.
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Happy to help! But your lifeline can be found in the mirror. You came here and clicked. And that made all the difference.
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Easier than I expected it to be. Thank you very much.
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Thats good . Very clear and straight forward
The first minute of your video
Nice and simple introduction to F distribution ! Keep up the Good work Professor Brandon ! Thanks ...
Hey, Keep doing the good work! You are really good at it...
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Thank you for making this video!
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Thank you so much for this video, it helped so much to breakdown what a F-ratio is. I have been struggling in statistics so this helped a lot
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THANKS, IT WAS HELPFUL.
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goodness of fit test shud be first in the playlist and then afterwards chi test and F test.
Can u make an abridged video or a comprehensive video, where u can cover situation in which we can use a particular video. Also, plz make an video, emphasizing statistics in medical field -
1] How to read the result of study
2] How to determine that the study is plausible and not just manipulated via p value
3] Effects of power[ a dedicated video]
4] Cohen's d, this thing popped up on many sites
5] Biostatistical concept like odds ratio, relative risk
6] How to conduct studies and hence write thesis
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Thanks.
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I have basics understanding of Stats concepts. Can you please help me with the complete curricula or syllabus to get a complete statistical knowledge? I didn't find any such resources useful with the complete flow of where to start but your videos has helped me a lot.
Thanks
Keep it up.. have a great day ahead.
Brandon, many thanks for putting this series on youtube. Can anyone tell why can't we find F-ratio for sample means similar to what we did for variances? why do we have to compare them using t-test or z-test?
thanks
Very clear video. Love it. But in some contexts they still use 2 tailed test. Its not like u said in 13:07 and this does change the result. So what should I do. upper right tailed or 2 tailed. Thank you
It would be helpful if you provided us with the T84 or T83 way to access the distributions, assuming they are on those calculators.
Nice
Nice videos! By the way, do you have a pdf about the topics of your videos? I would like to skip the first 10 playlists but reading those topics. Thanks in advance 😀