Type I and Type II Errors

[Magicus]

Dude, thanks! In less than 5 minutes you cleared up weeks of confusion.

This is what pedagogy is all about!

[graffist]

It helps to know that the null hypothesis is essentially when there is "no effect" vs. "has an effect" as Ho and H1.

[SEEpath-ktjm]

1 week of misery solved in 4 minutes my God Thank you man:)

[MrsCoachA]

Hey Tony, your "answer" is based on a sample that has been taken. We take the sample to provide evidence to make a conclusion regarding the null. And even with our best made plans, sometimes samples do not reflect the population. So if we happen to get one of these weird samples, it can cause us to reject a null that is actually true, or fail to reject a null that is false. This is how we get the errors mentioned.

[HueJazzz]

wtf is this? this had nothing to do with type 1 or type 2 diabetes, why did they send me here???

[craiglistly]

thank you.some examples of actual problems would help make idea clearer though.

[mzgemini]

I'm still confused.... but the good thing about Youtube is you can play it over and over again hopefully it will stick in my head.

I wish you had a few more examples

[jenniferfurtado]

Very good and crisp explanations of Z test, T test and Type I and Type II errors. Good work. could it possible for you to load videos on Residuals, Principal Components and Scatter plots

[Jake-xmfm]

Thank you so much for the help! my teacher doesn't explain things well and this video really helped!

[lalitdas]

thanks for the help, hope you keep uploading the videos in simplest way :-)

[grevolution]

In the passage rate example, do you mean that the average grade of the 150 students of the sample is 88/100 or that the proportion of students that passed (in terms of either pass or fail) the final exam was 88%. Im asking that because if the latter is the case, what is the meaning of a standard deviation of 4% on that proportion? Thanks! And of course thanks for all your videos!!!

[patwheeldon]

Excellent explanation ... wonderfully helpful!!

[aznxbigazn]

wow very useful, love this tutorial you should be a Prof or T.A

[amomi]

Great info! Thanks for providing such a clear example.

[zackpride]

Ok so once you have the power of the test how do you calculate probability of Type 1 error?

[courtneysnelll]

Do you happen to have powerpoint slides for your videos

[NoNo-jvry]

Thank you mate. Would have been more of a help if you could include a complete example though.

[tonygambino]

How would you make an error though? Do you mean BEFORE you run the statistical test? Because if you run the test you would have the answer so how could you have a Type I or Type II error??

[SalmanMoyeen]

So how do you determine if the null hypothesis is True or False? I know how to find "reject and fail to reject null Hypothesis..

[attangi]

is this not supposed to be a one tail?