helpful for psych majors like me LOL can i clear, if our professor.. blanked the SD or variance.. i will manually compute it, like SD on one sample t-test but different in denominator?
Idk if it matters anymore, since its a three months old comment, but just so you know there is difference berween sum of x and sum of x^2 You get 49 by addidng the squares of x. Like 2^2 + 4^2 + 2^2 and so on thats how you get 49.
Could you clarify though, why you are using a t-Test with ordinal data? According to a chart provided by our professor, Wilcoxen is a bettter fitted test?
Why is this solved with a parametric test, rather than a non parametric test? I just read that normally when asked participants to rank something the distribution will normally be not normal. Please if someone know, could you help?
I want to ask you that in this example you calculated Before - After to find X mean but in one book i found After - Before... plz help me because i m confused
Why do we subtract it (before - after)? That was asked during my report. My prof said it should be logical to subtract (after - before) instead of the other way around. I am not so sure if I am going to agree with that. I did it in your data but made it one-tailed asserting an improvement, and it gave me a negative score. That should fall outside the rejection area; it will not reject the null.
what kind of SD are you calculating? there is another SD formula. why you take that one? also how did you know that it affected significantly? maybe it affected but not significantly. or are you choosing between only two answers "affected significantly" and "not affected"?
I can't find any posts on a paired sample t-test. Is a dependent t-test the same thing? If not would you please direct me to where something has been posted?
It doesn't matter in this case -- it'll just give you a difference in signs for your X_d value. Since your high and low tolerances are the same number with opposite sign, you'll come to the same conclusion about whether your t value is within your acceptable range or not regardless of the sign on X_d.
No, it is indeed a two tailed test. When the question asks if there is any difference, then you would need to test for change in both directions. One tailed tests will have to specify in what direction they would be testing for.
You don't know the good you do, sir, you really don't know how much of a hero you are. Thank you.
He gets 49 by squaring each number under "differences", then adding them all up.
(2^2 + 4^2 + 2^2... etc.)
;)
Thanks
i computed it.. and i got 47?
@@sophiaespiritu6680 It's 47.
Cancel the negative sign of 1
Thank you
you just summed up my 3 hours lecture into a under 5 mins of human-tongued explanation video. god bless you, and thank you very much,
These are - by far - the most direct and succinct statistics videos on TH-cam. Thank you!
You explained it better than my professor. Thanks!
I feel you Hahahaha
How did u get the 17
bless this teacher, bless his videos, bless his soul
Your series are amazing!!!! Thank you.
It should be one tailed right?
can you show me how to do this problem but to solve for independent variable instead?
Please the for the standard deviation there was 17 in your calculation. I think it's suppose to be 1.7
helpful for psych majors like me LOL
can i clear, if our professor.. blanked the SD or variance.. i will manually compute it, like SD on one sample t-test but different in denominator?
So easy to understand! Thank you!!
When it is a one tail how do you know if it is going positive or negative??? please help
how do you get SD for 1.49? Am I putting it a wrong way?
how did you get 49 when finding the standard deviation
Idk if it matters anymore, since its a three months old comment, but just so you know there is difference berween sum of x and sum of x^2
You get 49 by addidng the squares of x. Like 2^2 + 4^2 + 2^2 and so on thats how you get 49.
+afsah shaikh i think that should be 47 not 49?? am i right
.
thank you
@@afsahshaikh9902 It's actually 47.
Omggg thank you. Having finals for my math comp. This is super helpful
Ok all I want to know is how or no where did you get the 49 sir in SD?
Same
Really late on this one, but if you take all of the difference numbers and put them to the power of 2 and add them all up you get your 49.
Could you clarify though, why you are using a t-Test with ordinal data? According to a chart provided by our professor, Wilcoxen is a bettter fitted test?
Thank you so much. Explained very thorough.
I love your work!
oh my gosh you made my life so much easier. thank you for posting these videos! they help out so much!!!!!
Why is this solved with a parametric test, rather than a non parametric test? I just read that normally when asked participants to rank something the distribution will normally be not normal. Please if someone know, could you help?
Is correlated sample t test are the same with dependent sample t test ?
What if null hypothesis value not suitable for rejection
Is a dependent samples t-test the same as a paired samples t-test?
is this paired sample test or indepedent sample test
Where did 49 come from?
I want to ask you that in this example you calculated Before - After to find X mean but in one book i found After - Before... plz help me because i m confused
Thank you so much to teh teacher! I was bit confused by own lecturer, when the solution in this video!!
what is the difference of t value of correlated means and t value of uncorrelated means?
Thank you very much this helped me a lot in my Biomechanics lab report !
How do he get the 1.49???
Why do we subtract it (before - after)? That was asked during my report. My prof said it should be logical to subtract (after - before) instead of the other way around. I am not so sure if I am going to agree with that. I did it in your data but made it one-tailed asserting an improvement, and it gave me a negative score. That should fall outside the rejection area; it will not reject the null.
This just saved my life! Thnak you very much sir
How do he get the 1.49
what kind of SD are you calculating? there is another SD formula. why you take that one? also how did you know that it affected significantly? maybe it affected but not significantly. or are you choosing between only two answers "affected significantly" and "not affected"?
Thank you for responding. You must be a nice person.
Doing my pre-reading for my Business Stats tomorrow.
How come the 49 in xsqauare value
Shouldn't we be looking for t(8, 0.025) from the table?
I mean t(9, 0.025)
Thank you so much for this great effort 🌹
how do you get 17??
I can't find any posts on a paired sample t-test. Is a dependent t-test the same thing? If not would you please direct me to where something has been posted?
Lost me at 49.. but that was lovely
Shouldnt the mean be 1.7 instead of 17 at the last part? I'm confused
You divide 17 by 10 to get the mean.
Is SD not equal to 1.41?
Watching this cuz our teacher didn't give us any module about T-TEST Dependent
Great explanation! Thank you!
explanation of SD poor - no explanation as to where the Ex^=49 comes from nor the Ex = 17Very confusing
1. Square the difference.
2. Add all of it.
I cant follow where did you get the value of 49 in computing the standard deviation of the difference.
put a square on each number diff. then add them all up.
You did the before value - after value, shouldn't it be the other way around for these tests?
It doesn't matter in this case -- it'll just give you a difference in signs for your X_d value. Since your high and low tolerances are the same number with opposite sign, you'll come to the same conclusion about whether your t value is within your acceptable range or not regardless of the sign on X_d.
Shouldnt this be a one tailed test?
No, it is indeed a two tailed test. When the question asks if there is any difference, then you would need to test for change in both directions. One tailed tests will have to specify in what direction they would be testing for.
thanks so much
i really appreciate the good job done.
why are you using weight (before) to minus (weight after), instead of using weight (after) to minus weight (before)?
Because its a weight loss pill so the weight afterwards maybe less than before idk..I am jut guessing
Where is the delta 🤷♂️
I can better understand it here. Thanks for uploading this video.
Would the actual answer be 3.81? And not 3.61? Overall this video was still helpful :)
shouldnt it be 47 not 49???
when '-1' is sqr it become to '+ 1' therefore 49 and not 47 :-)
you save my life thank you
you said that i'll just do 2^2+4^2+2^2... etc but in the end it's not 49 it's 47
Why is it a capital N? I thought that was only for Populations?? Isn't this a SAMPLE?
You're the best man!
this is so great! thank you!!!!!!!!!
You totally sound like Gabe off the office.
very useful, 🙏
Well explained. Thanks alot
idk what to say just thank u sm
Thank u, sir!
Super helpful!
Thank you prof
Could you use a better mic next time?
Thanks
Thanks for the vid :)
Wrong answer becaue on the differences you minus - you did before-after but according to method its after-before
That was beautiful
Very clear thank you very much
very helpful!
GREAT!!! THANK YOU!!!!
You're my life saver ;)
Thank you! U just saved my ass! lol
TQ
ANYONE FROM RP HERE? YOLO YOLO YOLOLOLOOLOLOLO
greatttttttt
f*******k this is also on you-tube. Eppppiiiicccc!!!!!
Mali ka👌 dapat maliit na n lang ang sample size
u r owsm
Is dependent samples t-test the same as paired sample t-test?
I cant follow where did you get the value of 49 in computing the standard deviation of the difference.