Chi Square test for Independence of Attributes| Concept and Solved Numerical |

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Amazing explanation, watching one day before exam and understood the concept.

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Thnku sir ...bda dar lgta tha is chi square test se ..bda hi complex topic lgta tha ye ...but thnx again sir ..u make it very easy for understanding purpose 🙏🙏

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Ur explanation is super I learnt very easily chi square with ur calculation

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[@mehedipial9116]

sir can you please explain why you took null hypothesis as : techniques are not significantly different. Why not "The techniques are different(independence of attribute)". I saw the video several times but couldnot understand. Thank you sir

[@GouravManjrekar]

Whenever we have to set null hypothesis it is always equal to type.
It is asked in questions see at 18.49
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@@GouravManjrekar Thank you very much sir

[@mehedipial9116]

@@GouravManjrekar Sir in that case, in 1st math why didnt we take null hypothesis as "there is association"
Greetings from Bangladesh

[@SumitGaming-]

@@mehedipial9116 bz it's is test of independence which means no association

[@dakshbatra199]

Why null hypothesis was not taken as both the sampling techniques are different ?
In ques 2!!

[@Someone_1758]

yes same question, @Gourav sir,can you plz reply why

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[@Hemabhartihema4912]

Dear Sir,
Time 26:00
4 divided by 31 =0.129
But your value is different.
So, this also affects our ans.
Please sir.
Make us sure that which one is correct?? 🤔

[@GouravManjrekar]

By mistake we write 4/31 as .012 but correct value is .129
Final answer has no effect by this value.

[@anuragg9686]

Also 4 divided by 84 =0.0476 24:45

[@omkaryadav4394]

Sir pls make video on ordinary lest square method

[@arpitjain14]

sir i have a doubt, what will happen if more than 1 expected value is less than 5, (r-1)(c-1)-n? will we do this to find the degree of freedom, please do reply sir.

[@GouravManjrekar]

Yes, Where n = number of time you pooled expected frequency

[@arpitjain14]

@@GouravManjrekar Thankyou so much for the reply sir.

[@praveentanikella4078]

Nice one but brother if we get expected values below 5 three time i.e Fe having numbers 23,23,3,4,2,20 like than degree of freedom will be (2-1)*(4-1) - 3 like that .

[@adityapinnika1413]

Yesss
Same doubt

[@scubeap]

It will be accepted. Its just a rule that in chi square test the expected frequencies must be at least 5. It have no relation with the degree of freedom.

[@studywiths.k.8710]

Sir agar chi square ki valu table value se kam ho to null hypothesis reject nhi hoga?

[@shishirtripathi8467]

What If the expected frequency is exactly equal to 5 ?

[@scubeap]

It will be accepted. Its just a rule that in chi square test the expected frequencies must be at least 5.

[@shishirtripathi8467]

@@scubeap Okay thank you 😊

[@ajayshukla6891]

Null hypothesis should be there is no association between quinine and fever

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[@Krishnayadav_04]

thank you sir

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[@saptarshidey363]

sir H0 is there is no association between rows and columns implies techniques adopted by 2 researchers are different . But you wrote contrary to this.

[@GouravManjrekar]

See video again I have told meaning also

[@felinarose.v4768]

Thank you for this video this really helped😊 but I just have one clarification , why aren't rounding off the numbers for example at 15: 01 , 1600/60 = 26.666 why aren't we rounding off to 26.7 ?

[@saurabhrathi464]

Hello sir,
can you cover ANOVA topic in your upcoming videos?

[@GouravManjrekar]

Yes of course ....
Keep watching videos on every Monday Wednesday and Friday at 8:00AM on our Channel about Statistics.

[@saurabhrathi464]

@@GouravManjrekar Thank you sir

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ua-cam.com/video/8DaOIjuF4BY/v-deo.html ANOVA

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@@GouravManjrekar Thank you sir

[@akashsahu236]

Hello sir
Mujhe koi book ka na bta do jis mein practical question kyuki concept to clear hai bs practise krni hai example ke sath

[@GouravManjrekar]

Mathematical statistics by sc gupta , Kapoor,
Fundamental of statistics by DN Elhance

[@poonamprasandkharadi7597]

Nice

[@DHF....Prabhas]

Sir what will happen if we don't merge the last two values 25,2
Is our answer will be same

[@adarshbhardwaj9853]

if the summation of original frequency and expected frequency are not the same then in that case how to solve it?

[@sugandhijoshi3553]

thankyou sir

[@GouravManjrekar]

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[@vishalahuja6993]

Sir what to do if frequency is less than 50 in total

[@renugodara9075]

Second question me d.f( r-1)(c-1)= 3 hoga sir aapne 2 kyu liya

[@GouravManjrekar]

When we pooled expected frequency then we love one more degree of freedom
Hope this will help you

[@vineethanairnk]

@@GouravManjrekar sir I understood what you did in that problem but can u explain one more time why you subtracted 1 one from 3

[@GouravManjrekar]

When any expected frequency is less than 5 then to make it more than 5 we pooled expected frequency.
That why we lost 1 degree of freedom more.
So we have original df as ( r-1) (c-1) = 3 .
Now we pooled expected frequency then we have 3-1 = 2 df 👆👆

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[@Ajay-gw9zc]

Can you please share name of the book from whick the question no 2 taken

[@Muskan_igdtu]

LOS q1 me 0.05 kese liya ? kha se pta laga i dont understand please tell me

[@pragatideole110]

how to calculate tabulated value 3.84

[@1dhdh]

See χ2 table for v=1

[@aryangulati7165]

in the second ques why did we take the null hypothesis as they do not differ why didn't we took they significantly differ
please someone clarify my doubt

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❤❤❤

[@ankitrai1441]

App kaun se book se question lete hai wo batae please
Mere college me bhi yehi questions dete hai par book ka naam nahi pata

[@GouravManjrekar]

SC Gupta and VK kapoor

[@morancium]

I have a doubt, how can we decide that Ho will not be "Two methods are significantly different"
why we took Ho as "They are not significantly different"
Can someone please help me... i am really confused.

[@amritraj3934]

bhai tu bhagwan hai!!!

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Testing of Hypothesis: ua-cam.com/play/PLRNL7AjA6rjy_ryWXKMil8CjtLQjUiy0I.html

[@RajparaShubham]

Iski 1st video kaha hai?

[@GouravManjrekar]

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[@RajparaShubham]

Ty bro sir

[@MsINDIA-we1lk]

Sir, total chi value is 0.923 not 0.911

[@neetubhardwaj8143]

Clear nhi h show ho rha

[@neetubhardwaj8143]

Sir

[@tayyabaarshad8137]

why we use chi square for independence of attributes?

[@GouravManjrekar]

See video 2 of below playlist
Chi Square Distribution and Chi Square Test: ua-cam.com/play/PLRNL7AjA6rjxVTlKSB4TNFY8y5qKF-mQa.html

[@anmoldeepsingh1829]

Video is not playing sir

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See again

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Playing

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Thank you so much sir for this vdo it is very useful for me😊

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