I had never seen such an amazing explanatio , thank you so much!!!!!
@malvikapant7622
10 ай бұрын
crisp and clear. Thanks for the simplification
@pax_academy
10 ай бұрын
Glad it was helpful!
@Shrutimmmmm
6 ай бұрын
Thanksssss for such a crisp n clear explanation!!!
@pmicozzi
4 ай бұрын
Bravo…please make more videos…you make the complicated easier to understand!!! TY
@ramirolopezvazquez4636
24 күн бұрын
Beautiful video! Thanks a lot!
@jewelminor5526
8 ай бұрын
You are able to make learning so stressless. Thank you.
@haifaelhassan2436
11 ай бұрын
Great to-the-point explanation 🙂Many thanks
@pax_academy
11 ай бұрын
Thank you very much!
@BradleyWek
3 ай бұрын
Thank you it's useful
@TamunokuroJohn-xb2tg
2 ай бұрын
❤
@alanon2572
5 ай бұрын
Day before the exam and here I am
@Aryanm0503
4 ай бұрын
My exam is after 2hrs😂
@wardakashif2469
4 ай бұрын
3 hourse before the viva and I'm here😂
@matthew1028-n2i
5 ай бұрын
Sorry, I have a question about the Z test. Why did you find the critical value depends on the standard deviation of 0.025 instead of 0.05? Is it about one tailed test and two tailed test? Thank you!
@happy_ritwika
5 ай бұрын
When the Alternate Hypothesis is "not equal to" the population mean, then we use a two tailed distribution. In a z or t test for a two tailed distribution, we find the z score or a t score for "alpha/2" because the critical value lies on each side of the mean. So if the Confidence Level is 0.95, then the Level of Significance is 0.05. Then alpha/2 = 0.05/2 = 0.025. If the Alternate Hypothesis is a "less then" population mean kinda scenario, we use a left tailed distribution. Then the level of significance is not divided by 2. So it just remains alpha. And we calculate the z and t test for alpha. Hope this helps...
@joeycaunsag4245
5 ай бұрын
I'm confused, what if we are dealing with sample standard deviations yet the sample size is more than 30, what's the statistical test
@kiwifrenchie6036
4 ай бұрын
I think it’s just depending on if we know the population variation. If yes use Z if not use T
@selmaamar532
8 ай бұрын
So helpful
@sajanyerra
11 ай бұрын
Hi! thank you for the very clear explanation. One question though, in the t-test we took 'Null Hypothesis as price = 2.45', can we also take it as 'price
@pax_academy
11 ай бұрын
Absolutely, you can also choose to state the null hypothesis as
@sajanyerra
11 ай бұрын
@@pax_academy thank yo very much, for responding :)
@chalseabito962
8 ай бұрын
Thanks alot 🙏🏾🙏🏾but please what's that chart called
@BSN4year
5 ай бұрын
Unable to understand 😭😞😭😞
@a7med_kt897
2 ай бұрын
Really? I found this one is really clear
@engelnkosi7002
2 ай бұрын
what if the mean is not given? how do i calculate?
@victoriambelengwa1177
16 күн бұрын
AMAZING 🎉
@keerthikas999
Ай бұрын
thank you
@nancykamau5915
9 ай бұрын
I got it now. What a nice tutorial
@krasnerjessica2967
11 ай бұрын
im new to stats...did you mean to write u-1 instead of n-1 fkr the degrees of freedom, or am I confused
@pax_academy
11 ай бұрын
Excuse my hand-writing but I did indeed write n-1 although it looks like u-1 :) n stands for sample size. Thank you!
@kanakanakanakanameki2055
8 ай бұрын
Thank you so much i appreciate it. this is very easy to understand
@mansaproduct1982
11 ай бұрын
when calculating for the t-value, why is the degree of freedom not applicable (n-1)?
@pax_academy
11 ай бұрын
Thank you for your question. I think what you're asking is why do we use the degrees of freedom when calculating the critical value and not the t-value. The reason we use degrees of freedom to find the critical value is because the t-distribution's shape changes depending on how large the sample size is. As the sample size increases (degrees of freedom increases), the certainty of the estimate increases which leads to less spread in the distribution.
@vivianmassao
26 күн бұрын
Sirrr thankkk youuuuu🥹so muchhh
@alexmuriiki487
10 ай бұрын
YOU ARE AGREAT TEACHER
@pax_academy
10 ай бұрын
Thank you!
@JavierBonillaC
9 ай бұрын
8:28 we cannot reject the hypothesis that the value is 75. Alright. But I would have loved for you to involve the 95%. That means that you can be 95% sure that the age of women in the US is 75. Right?
@anuj8825
5 ай бұрын
I don't think 95 can be involved anymore. 95% would have been the confidence interval in case we rejected, which means that if we sample the population enough times, 95% of the times the mean of the ages will give you an answer which is NOT 75. The number 95 says nothing about the original average of 75 years The confidence interval is to support the rejection, but says nothing about confidence of the null hypothesis data
@SherwinQueniones
4 ай бұрын
Why 1.43 mine is 1.428
@joshuaguzman202
4 ай бұрын
Ur insane this made it so clear unlike my lecturer who made it so convoluted
@Joxora
4 ай бұрын
Thank you sir. Well expantiated and understood😊
@akberali4866
Ай бұрын
Thank you for everything, i’ve an exam in 2 hours and it’s not just that i was struggling with critical values that you’ve helped with. But the calming and soothing way of teaching is what made me at ease. Again thank you so much of this :)
@atheaautida4886
4 ай бұрын
thank you thanj u!!!!!!!!!
@travisr82
11 ай бұрын
Life saver 😊
@pax_academy
11 ай бұрын
Thank you! :)
@tehreemanwaar
Жыл бұрын
informative video 😃
@pax_academy
Жыл бұрын
Thank you!
@dorinalarionov6792
4 ай бұрын
Thank you It’s really helpful
@yashgupta4099
5 ай бұрын
All doughs cleared Man ❤😊
@echezonajasmine8747
2 ай бұрын
How did u get 0.01 in the rejection region and 0.025 in the rejection region
@Mithasvlog
Ай бұрын
It depends on your confidence level. In some question the confidence level was 95 % which is 0.95 in decimals. 1 minus 0.95 is 0.05 , in a one tail test. If it’s a two tailed test it’s 0.05 divide by 2 which means it’s 0.025 on each tail. In another case 99% is 0.99 in decimals. Hence 1 minus 0.99 is 0.01 in a one tail test and 0.005 in a two tail test because 0.01 divided by 2 is 0.005. Hope this helps
@Star_Handler
10 ай бұрын
Great video! This really helped me understand my statistics homework so much better 🎉
@pax_academy
9 ай бұрын
Glad it helped!
@MedManiac1
9 ай бұрын
great great great
@eynjel2
5 ай бұрын
Thankyou for clear explanation ❤
@aimanmari349
7 ай бұрын
So helpful Thankyeww so muchhhhh❤️
@iraafzal5219
8 ай бұрын
Thank you so much ❤❤❤❤
@samsonisaac3476
11 ай бұрын
What test is used when n>30 but then pop. variance is know
@pax_academy
11 ай бұрын
Thank you for your question. The test used when the sample size is higher than 30 or if the pop. variance is known is the z-test.
@bangtri347
10 ай бұрын
I have a question for the second problem, shouldn't we be using the value corresponding to df=24 and CI=99%? Why did you use the CI value within the 98% CI?
@readingeducationjourney
10 ай бұрын
Because of the degree of freedom, i guess
@pax_academy
10 ай бұрын
Bear in mind that this is a one-tail test, therefore our significance level is calculated from doing 1 - CL of 99% = 0.01. If it were a two-tail test we would find 0.005 (0.01/2). Hence, we use the degrees of freedom found (24) and our signif level of 0.01 to find a critical value of 2.49.
@bangtri347
10 ай бұрын
@@pax_academy Oh okay, I understand now, thank you very much. Hope you continue making educational videos on Statistics!
@tanishpawaskar2980
10 ай бұрын
Thank you so much it really helped me
@pax_academy
10 ай бұрын
I'm glad it helped!
@raizaya
11 ай бұрын
very helpful thank you
@pax_academy
11 ай бұрын
Glad it was helpful!
@elcinogretmen
10 ай бұрын
Thanks a lot for sharing🎉❤
@pax_academy
10 ай бұрын
My pleasure !
@sarasultan1745
10 ай бұрын
You helped me a lot thanks
@pax_academy
10 ай бұрын
No problem!
@SammykeyzMachaa
10 ай бұрын
Great 👌
@pax_academy
10 ай бұрын
Thank you!
@dananjayachathuranga7113
11 ай бұрын
thank u
@pax_academy
11 ай бұрын
You're welcome!
@user_elvis
11 ай бұрын
Very comprehensive
@pax_academy
11 ай бұрын
Thank you very much!
@user_elvis
11 ай бұрын
Could you avail your concept on linear programming & break-even analysis thank you@@pax_academy
@mazenalnassri7487
9 ай бұрын
First question sample sd is given not population sd, so should not we go for the t-test?
@pax_academy
9 ай бұрын
Unfortunately no as the sample size is of greater importance. As n is higher than 30, we must use the t-test. Thank you for your question!
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