Hypothesis Testing Full concept in Hindi | statistics | Engineering Maths 4 Lectures

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[alfaandomega]

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.

[prajeshparekh]

aap ne variance ko SD me convert kiye Bina hi formula me put kiya he n direct book me se jawab laya hei ne wale samaj jayenge bt ye comment beginners ke liye tha Mera 🙏🏻

[sachinrathi]

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.

[pallaviagrawal]

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

[niranjankhandelwal]

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

[rachitgupta]

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!

[jayantaacharjee]

Level of significance 5 % distributed to the both side i.e. 2.5% on left and 2.5% on right.

[saxenaiway]

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).

[RameshSharma-kbqc]

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

[aftabjaved]

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

[cyrilsouza]

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)

[MONOJIT]

Advanced congratulations for 1 million 🎉❤

[veditmalhotra]

@9:55 he says null hypothesis will be accepted. You never accept, it is 'Do not reject'. Good video overall!

[DrWD-hrez]

Jazak allah khaira, allah aapko kamyabi dey aur salamat rakhey

[sreejithsmon]

Way of teaching is good.Tell ur camera guy DNT change the focus randomly.

[entertainmentforall]

your method of teaching is very good am appricade you

[GeetaNakar]

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.

[mahendravasava]

સંશોધન Hypothesis testing વીશે ખુબ ઉડાણપુવૅક માગૅદશૅન પૂરૂં પાડવા બદલ આપનો ખુબ ખુબ આભાર સર

[CyberSecbyAnshika]

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??