Hypothesis Testing Full concept in Hindi | statistics | Engineering Maths 4 Lectures
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Level of significance = 5% hai to dono taraf range 2.5% kar ke chorna hoga tab total LOS=5% hoga and Level of Confidence=95% hoga
Par aapne yeha miss kiya hua hai ye
Z=1.96 tht part is not explained well
You have made a couple of mistakes
1) In the question, variance is given as 10.24. To find the value, you use Standard Deviation, not the variance. So, you should have taken the square root of 10.24, which is 3.2
2) Since level of significance is 5%, it is 2.5% on each side as it is a two-tailed hypothesis
Z value would be: (6.2 - 5.4)/(3.2/sqrt(50)). This is coming as 1.77. As per your method, it would have been only 0.55
Since this is 2 tailed hypothesis, we have to look up the Z value for the probability of 97.5% (not 95%) on the right hand side, which is 1.96. If we look up 5% on both sides, it would have been 95% i.e. 1.645, not 1.96
Your answer is correct as you are getting correct pre-calculated values in the background but the methodology is wrong and using your calculations would give different numbers.
thank you sir
Thank you much I was confused as to how 1.96 is coming and you cleared my doubt
thank u sir
Yes you are right
Thanku sir
Bhaiiiii aap ne variance ko SD me convert kiye Bina hi formula me put kiya he n direct book me se jawab laya hei .....samaj ne wale samaj jayenge bt ye comment beginners ke liye tha Mera 🙏🏻
Bhai woh bhi "last moment" par hi padh ke aye the
@@SureshChouksey Right😂
Thank you bro
U saved my life
Yes Right.
Bro i was having zero knowledge about this topic but i serach for this topic they have more confused me. But you have explained it nicely
Same to you sis☺️
Same
Level of Significance : 5% is distributed as 2.5 on each side & level of confidence :95% in graph its not 5% on each side. Please correct it
Right
Exactly. Galat padha dia yaha pr. Channel is good. Needs more content verification.
Bilkul sahi kaha
I will be 1 ka 5%, so it is 0.05, both parts divided 0.5 left side and 0.5 right side.
Bro, this is correct z value at 5% distribution is 1.96
Well explained but want to correct 2 things.
1.We never accept the null hypothesis , we either reject null hypothesis or fail to reject null hypothesis.
2. If it is two tailed test then rejection region should be divided by 2 i.e instead of .05, it should be .025 on both side.
Right
Shubham Singh
1 second ago
bhai 1.96 kaise koi bhi jaldi batao
1.96 usne z test k normal distribution table se lia h. He did not tell that. There are values assigned to that
@@mrinalchandra he told at that time from chart or table we get these values in research methodology last some pages
Variance is square of standard deviation i.e. sigma square fir aapne question me given variance ki value ko sigma (standard deviation) kiyu mana ?
No words to say about the way you explained the things, used simple and made it easy to understand. Thank you so much.
Could you please make video on p value?
How to get z value 1.96
Bhai ya ap ko table ma given hota h
Earlier I found the topic difficult.. now it's both confusing and difficult.. Sign of standard derivation is sigma.. variance is represented as sigma^2.
Also, when you said that null hypothesis is when H• = 0.05.. then why was it accepted??
Level of significance 5 % distributed to the both side i.e. 2.5% on left and 2.5% on right.
If it's a two tailed distribution
@@rishabhsolanki4512 and yes, this problem is two tailed distribution
Your example is two tailed test. As your alpha is 0.05 then both side rejection area will be alpha/2 which is 0.025
Yes
@@bhavanasharma629😊l0😊llpl
great explanation 👍
Just the z- score of 0.05 confidence is 1.64
So 177> 164
Therefore, Null Hypothesis is not accepted.
(I am not that sure just confirming)
Z-score of 0.01 confidence is 1.645......
Video is correct here...
Finally found is topic ka solution !!
Thanks alot!!! For providing practical analysis on such terrible terms! ❤️
z= 0.55
In that question variance is given,we need standard deviation ,but u took variance directly.
Jagadeesh. He should have mentioned that he is using the standard error of the sample mean while calculating the Z value of the sample.
Root kar k kigiye, ans same hi aayega .
Variance = 10.24 given means sigma( standard deviation) is square root of variance = 3.2 and this is sample standard deviation, not a population standard deviation, so ee have to find out
t- test statistics.
Agreed on 1st point.... but when sample variance is given then z test is supposed to be used....
02:29 Hypothesis testing is used in statistical analysis to find out facts or conduct surveys.
04:58 Hypothesis testing involves comparing a null hypothesis with an alternative hypothesis.
07:27 Null hypothesis and alternative hypothesis are mathematical opposites.
09:56 The level of significance determines whether the null hypothesis is accepted or rejected.
12:25 Performing hypothesis testing to determine if a sample is drawn from a normal population
14:54 Understanding hypothesis testing in statistics
17:23 The critical value in hypothesis testing is determined based on the level of significance, such as 5%.
19:52 Hypothesis testing involves 5 steps
13:45: S.D of the population = UnderRoot(Variance). Since the value 10.24 is the variance, it's underRoot has to be taken and that would be 3.2. Only then the final Z value will be 1.77.
Please Take Note!
🤘👍
Is there anyone who can make assignments on these tests?
Yup bro thanks for advice
I want help
Yes correct, I was also thinking the same
If level of significance is 5% then u should have to take 95% of level of confidence in one tail test
And if u r doing two tail test then u should take alpha take 2.5 % i.e. 0.025 at both end
Yrrr ye meko smj hi nhi aati.
Or bio me bhi statistics pta nhi kha se aa jati h
Starboy world Thank you bro for mentioning it.
@@Poojachoudhary-jv6iy heheh😅
Stats is every where
@@raj9101990 ur welcm bro 😊
Z=1.96 kaise aya
No problem it is human to err, you are doing good but only thing i recommend is do your pre video homework diligently, normally little mistakes happen but that must not discourage you. I m statistics teacher myself from Pakistan. Bravo keep it up
thank u so much for ur advice
Mjhe zra smjh ni ai k 1.96 kesy aya plz ap smjha dein
I guess you have done mistake with regards to variance and S.D.
Variance = square of (SD).
You have used variance directly instead of SD.
absolutely
In two tail curve distribution I think each side critical value should be half of the significance each side. Exallent presented
11:37 please be a bit concerned about auto-focusing problem. Setup your camera manually from the next video onwards please
Camera auto focusing
@9:55 he says null hypothesis will be accepted. You never accept, it is 'Do not reject'. Good video overall!
Bro, if the p-value is less than the significance level, then the null hypothesis is rejected, not accepted...if it is above the significance level, then the null hypothesis is not rejected. Don't provide misleading information!!!
Correct! Please make one another video and correct it
Hi my name is Diya.Can u plz contact me.muja ekta teacher chaiya statistics ke liye please contact me.My number is 6294865773. Abhi corona k liya koi bhi teacher nahi mil rahi hai.
is it they should only make video if the concepts are cleared they can damage someone's concepts totaly
@@diyaroy9068 You can refer to the channel Statquest. It is really awesome!!
What p value are u talking about bro
your method of teaching is very good am appricade you
Way of teaching is good.Tell ur camera guy DNT change the focus randomly.
Please upload a viedeo on f-test, z-test and student t-test so that we can fully understand this topic.
The channel name is so accurate XD
Lol, he didn't get it, and gave you heart.
How to identify that 1.96 with help of table
Your voice is so loud and clear, it made the video really awesome
Very splendid explanation.....
You cleared basic terms regarding this topic....
Keep it up.....,,👍
Variance ( Sigma ²) = 10.24
Standard deviation ( Sigma) =√10.24 =3.2
5% level of significance that is half in two-tail, .05/2= .025
In the question you were given variance which is sigma square and you used it as Standard Deviation(sigma). The value of Z you calculated was 1.77 then you changed it to 1.96
in the question solved in the video, variance was given but we need to consider standard deviation in the formula so what is shown was wrong still the answer is correct because he directly wrote the answer without calculating . But the explanation helped me Thank you for that .
Thanks, great explanation using real life questions!
I literally watched several videos but this concept is clear to me from your video
Advanced congratulations for 1 million 🎉❤
Thank's for give Haypothesis testing relatel information sir
Your welcome
Awesome video!
Ps. at 10:57, Variance is represented as Sigma square.
but in this care variance is just sigma
Woh bhii last minute hi padhke aye the bro
Sahi bol rahi ho meri jaan
@@suryanshvsingh5496 ooo nalle
@@aakankshagosain4749😆
Presentation was very nice
But Please correct Point 1. Variance is square of std deviation (std written as variance in demo) . Point 2. 1.96 of bell curve represent 0.95 on either side. Also 5 % is for two tail is equally devided on both side hence should be 2.5 % (except if it is a one tail method is used).
Applied Mamathematics... Beautiful simple meaning of hyphothesis
Hello Sir, Could you please give an example of Hypothesis testing using t-distribution ?
I love the video and explaination.
Team leader Mr. X claims that the average output of his team is 900 pages per day. To check his claim 50 employees are selected at random and the average output is found at 854 pages with the standard deviation of 42 pages.
a. Construct the null hypothesis and alternate hypothesis for the given problem.
b. Is the claim of Mr. X true at 5% level of significance? Construct 95% confidence interval for the sample mean.
H(mull)=854
H(alter)/=854
Alter is accepted
Kindly reply
yes correct..@@shahzaibali8418
@@shahzaibali8418
H(null): mew=900(Claim of Mr X)
H(Alternative): mew!=900
z=7.071
z(alpha at 5% LOS): 1.96
Z>Z(alpha) So Ho is rejected and Ha is Accepted
H(null): mew=900(Claim of Mr X)
H(Alternative): mew!=900
z=7.071
z(alpha at 5% LOS): 1.96
Z>Z(alpha) So Ho is rejected and Ha is Accepted
विषय को बहुत अच्छी तरह से समजाया अलग अलग उदाहरन के साथ मार्गदर्शन दिया। धन्यवाद
Your welcome
One more point I want to add. In the question. 10.24 is the sample variance not population variance. Under such situation t-test is applied not Z-test. Better you consult some standard book of statistics.
Your way of understanding to people is very excellent
From where you get Z value 1.96, while you calculate Z value 1.77 can you explain please. Thank you
1.96 is Table Z value which is provided in the question itself. You will calculate the 'Calculated Z value' which is 1.77 here. Now if Calculated Z value is less than Table Z Value, then Null Hypothesis is accepted.
@@sachialol9278 z=(6.2-5.4)/(underroot(10.24)/underroot(50)) = 1.76
@@ironF5 why underroot10.24, in video he mentioned 10.24/√50 only
@@vaishalibansal1633 Standard Deviation is used to calculate the Z-value, which is square root of the variance. 10.24 is the variance, not SD. What he has explained in the video is not correct.
I am just thankful i found this video, you made it so simple to understand quite heavy concept.
Thank you
ખુબ સરસ માહિતી આપી ધન્યવાદ 😊
Bhai. Sigma = population std. Deviation hota hai na . Sample Variance = S^2 hota hai na????? 🙄🙄
Han jiii
Yes there are some mistakes in this video, but the explanation is awesome.
And surely it helps in the last moments ;)
Bro u have got full grip of it
Hats Off For Ur. .Effort
Thanks
Really a last moment tuition 🤣🤣
I have a doubt regarding critical value?
How can we give value to it as 1.96 ?
I didn't got this point....
usne integration nhi kiya
bas value de diya
It's a Z-score.. we have table for it.. you can also calculate it using the formula for Z-score .
Thank u so muchhhhhhhhhh....u made this tedious subject uncomplicated 🙏👌
Your welcome
Thank you so much sir first time I understood something in statistics
Best lecture sir 👌👍...loved it 😍😍
Thank you soo much.. it cleared my hypothesis concepts 😊
Explained very well👍
Mujay samjadengy ?
Important video about Hypothesis Testing.
Excellent explanation regarding null hypothesis....thanks
Your welcome
Critical value of 0.05 is NOT 1.96
1.96 is the critical value of 0.025
Yaa even i too didnt get that
good explanation if possible can you put the link of playlist into the description, so that it will be easy to find all videos easily
સંશોધન Hypothesis testing વીશે ખુબ ઉડાણપુવૅક માગૅદશૅન પૂરૂં પાડવા બદલ આપનો ખુબ ખુબ આભાર સર
GOOD GOING BROTHER..I LOVE U.. U OPENED MY EYES...i was confused but not now..
Z=1.77 ye value kese nikli sir plese help me
Yes sir , mera bhi ans nhi aa rha
U did it wrong man it is two tail so divide 0.05 by 2=0.025
Yes exactly
Yes, he was wrong. It will be 0.025 in both side.
Yes it's two tail
Yes
thank you for giving information about hypothesis testing.
Your welcome
Thanks bro but plzz upload videos on remaining topics too asap !!
Kindly let me know z value is 1.7 or .57 as i feel 1.7 is incorrect
z = (6.2-5.4)/(underroot(10.24)/underroot(50)) = 1.77
@@ironF5 Why underroot of variance?
Appreciate your effort because it makes it very simple to understand the concept
Thanks
Thanks alot sir ❤
Thanks sir...very well explaine for null hypothesis and alternate hypothesis test....again thanks...
Your welcome
bilkul bekar video
logic smjhao bhai beginner ko
kya khichdi pka rhe ho
aise bta rhe ho jaise 90% to hamen aata hi h
Bilkul sahi kaha
bro I liked it usne question ke saath explain bhi kiya, maybe its not for absolute beginners!
@@shivayshakti6575 I feel variance is wrong calculated is as sigma. it should be sigma square. what do u think.
Thank You for this great video ☺️
But I've to ask something that how do you put 1.96 from the curve?
at 5% level of significance 1.96 is the value of two tailed test
@@miss_Hima_ OK Thank You ☺️
@@MrAbdullah_Ch bhai mujhe hypothesis testing nhi aati aur ab econometrics bhi nhi aa rhi bhai bata deh hypothesis testing kaise samaj ayega
@@anubhavkumar9189 I've placed a video about hypothesis testing. Check that
@@anubhavkumar9189 ruclips.net/video/ID4vcXVMH8I/видео.html
Thank you for this video and information.
Your welcome
if alpha is 5%, the acceptance region would be 95% instead of 90%, and in case of 2 tailed tests, 2.5% rejection region would be there on both the sides. thanks
You have explained well❤️ but my teacher did not use this why she has explained us with the help of SST, or with mean square of regression or something like that so can you guide me on the base of these above terms
Thank you so much sir
Actually m studying in Sydney and it was difficult to understand for me but you almost solved my problem
Please urgent reply to me my exam for Applied quantitative is on 28/6/17 Friday
I need your help can you give me your contact
if you can speak to me I can give my contact
Thank you once again
Good explanation about hypothesis testing and how to calculate and conclude level of significance .... thank you
Jazak allah khaira , allah aapko kamyabi dey aur salamat rakhey
automobile tyre manufacturer claims that the average life of a particular grade of tyre is
more than 20000km when used under normal conditions. A random sample of 16 tyres was
tested and a mean and standard deviation of 22000 Km and 5000 km, respectively were
computed. Assuming the life of the tyres in Km to be approximately normally distributed,
decide whether the manufacturer’s claim is valid. Consider level of Significance is 5%.0
Awesome explanation
Keep watching
sir i am from canada and these videos are helping me to ace my exams
Nice video
Simply and clear understanding sir... Thank you
if the standard deviation of output per acre from a sample of 34 representatives firms producing wheat 83 kg is the hypothesis that standard deviation of output per acre of all firms producing wheat 107 kg rejected at 5% level of significance.. Please solve this
Bro my sir ask one question
Like find a any research problem
And show ther level of significant and
What statistical tool will be used in that
Which hypothesis method is used
And there scope
So what is tha answer for that
And how we present him
Am so Confused about this topic but when am see your video truly am understand hypothesis thnku so much for this osm video your way of teaching perfact. 😊😊
Awesome explanation .... thankuu...
Thank u sir❤
in this question variance is given, so you have to take out standard deviation from the same, instead of 10.24, 3.2 will be came, then the answer is 1.77. please mention this too, otherwise its confusing
Just because the value proposition of your channel is last minute tutorials, doesnt mean you teach like you yourself teach like last minute - in a haphazard way, and wrong. Firstly, variance is given in question. So sigma will be square root of variance. Secondly, it will be 2.5% on each side and 95% will be middle region. Please try and appreciate that people who come here to study for first time, place their faith in you and rely on what you say. You are their teacher. Try and remain calm, have some patience, and teach right. Having said that, salute to your efforts and the service you’re doing. Dont take my criticism negatively. Its just for your and the channel’s betterment
nice explanation really helpful
ખૂબ સારી ને સરળતાથી સમજાવ્યું .
નલ અને અલ્ટ્રેટેટીવ બંને વિશે સહજ રીતે સમજ પાડી છે,thanks
Calculated value of z is incorrect, although it is less than the critical value. So, your decision is correct.
well done taliya honi chahiye
Thank you sir
it is alpha by 2 on both sides not alpha ...It is two sided alternate hypothesis ....plz correct it
Good information of hypothesis ...Thank you
Your welcome
Level of significance will be 2.5% on both side in two tailed test instead of 5% each side and level of confidence will be 95% instead of 90%
good level of the speech.. im live in aus and easy to understanding of the method keep it up bro....
Bro you better learn to see some English tutorial first as it should I live in aus not i m live in aus
Thank u sir nice explanation
Your welcome
Very god information about hypotheses testing
Sigma mean standard deviation bro and (sigma)2 mean variance you should correct it