Sir plz reply lazmii dijiye ga mujhey ye samgh nhii a rha h k hm ny N-1 q kia h (41:20) questions 15.25 me..Jb k sample tw 100 tha or agar sample > ho 30 sy tb tw N bnna chahiye na instead of n-1 .plz clear my this concept sir...😢
Sample to 30 se greater hai. population variance/standard deviation unknown hai. To sample ka variance calculate krny k Liye (Unbiased formula) use Kiya jis me (n-1) Aya.. Based formula me (n) use krty.. Difference answer ziada nae aye ga. But approach (n-1) better hai algebraically.
sir meinney ek questions ko dono method sy solve kia same answer ye kesey possible h qstn is ( mean= 480, Standard deviation=1.8, & n=8) 90% confidence interval.
A random sample of n=25 gives Xbar =83.Cant this sample be regarded as drawn from normal population with u=80 and sigma is equal to 7 at 5% level of significance.
@@husnainbashir7610 please see my lecture, hypothesis testing for population mean by Waqar Dar. It's question of hypothesis testing and you can solve by yourself after watching my lecture.
Sir you are the best such me poore TH-cam per ap jaisa koi nahi parha sakta and today Wednesdays 25 September 2024 i am taking your lecture ❤
Sir May Allah bless you puray TH-cam pe ap jesa acha koi ni smjhata thank you so much sir please keep up the good work thanks again sir
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thanks aloooootttttt Allah apko khub Kamyab karay
AmeeN,
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This is so helpful.. Thank you so much Sir, Jazakallah
I'm so grateful to you sir ...you really helped me in clarifying all my doubts...once again thank you sir🙏
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Out standing sir
I think so this is one of the most excellent vedio for those students who wants to know about this topic stupendous sir
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Very help full sir you are Amazing sir keep it more please more vedio upload like that this
May you Live long Sir...very Understandable lecture❤
AmeeN thank you.
Boht acha lecture Sir g
Thank you
Thank you.
MASHALLAH deserves 5 ✨ 💖
Very informative lecture. Just subscribed now. Sir make video om completing whole topic in single video
Soon am going to make a playlist of each topic. In'shaa'Allah
Very helpful ❤
Sir plz reply lazmii dijiye ga mujhey ye samgh nhii a rha h k hm ny N-1 q kia h (41:20) questions 15.25 me..Jb k sample tw 100 tha or agar sample > ho 30 sy tb tw N bnna chahiye na instead of n-1 .plz clear my this concept sir...😢
Sample to 30 se greater hai. population variance/standard deviation unknown hai. To sample ka variance calculate krny k Liye (Unbiased formula) use Kiya jis me (n-1) Aya..
Based formula me (n) use krty..
Difference answer ziada nae aye ga. But approach (n-1) better hai algebraically.
Thanks Sir Jazak-Allah Khair 🌺@@waqardar4960
veryy nice😊
Nice 👍👍
Your explaining method are amazing and cooperative May Allah bless you all time ❤😍🥰
aur sir apne qn no 15.25 men biased formulae for sd or var kyoon nhn istamal kye..?
To match the exact answer given in book, normally students compare their answer with answer given in book.
i wish the like button could go upto 50.
Thank you sir!
@@FatimaSohailShaukat-t6z Thank you, Remember in prayer.
Sir book main alpha by 2 likha hai ap 1 minis alpha by 2 ka karwa rahay hain confusion ho rahi
Sir agr sigma known and sample size less than 30 then konsa method lagaye ga
Sigma known ho to z test hi lgta hai, lecture me btaya hai
Sir hum z or t dist: ko z or t test bhii bol sakte hen ya nahn...aur...inko graphs men zarur samjhaen....plz...plz
G keh skty hain, aur further lecture abhi me record nae kr raha.
Awesome lecture you are great 👍 sir
Thank u sir
Thank you❤
Mp.
sir you have written population variance formula for sample variance formula
population variance= ((x-Xbar)^2)/N
sample variance= ((x-xbar)^2)/n-1
Yes. Sample variance has two formulas, one I have written is unbiased estimator of population variance.
Sir 22 question me ap ne t distribution se q ni kiya sample siza less h 30 se?????
Population variance or population standard deviation known (given in qns) ho ga is liyE
Sir 30:31 pai z ki value 1.96 bnti hai
There might be a mistake,
Kindly see table of z distribution
n
Yes. Be clear that assumption of t test is
n < 30 and population standard deviation (Sigma) must be unknown .
@@waqardar4960 to 15.24 t test se hoga na. Na ki z se
@@AyushGupta29164, kindly share statement of question, then I will answer, I don't have book right now..
sir meinney ek questions ko dono method sy solve kia same answer ye kesey possible h qstn is ( mean= 480, Standard deviation=1.8, & n=8) 90% confidence interval.
I am not getting your point clearly but Because formula is same (means numerical values are same) but the only difference is of notation.
Is confidence interval and estimation interval is same?
Yes.
Sir hm ne confidence interval ka formula K andr U Miu b add Kia Hua h
@@waqardar4960
Sir hm ne formula mn Miu b add Kia Hua means aik trk plus sign and then Miu aur phir minus Ki value mtlb ye formula b likh skte h@@waqardar4960
Sir aap ne point estimation ka leactur ni prhya????
Point estimation is minor topic, calculation of sample mean, sample variance, sample proportion are examples of point estimation
@@waqardar4960 ok sirrr
Thankyou so much sir
My pleasure
Sir plz book ka nam mention krey aslamlaiqum🎉
Statistical Theory for part II, by SM Chaudhary
A random sample of n=25 gives Xbar =83.Cant this sample be regarded as drawn from normal population with u=80 and sigma is equal to 7 at 5% level of significance.
Sir g solve this question plz
@@husnainbashir7610 please see my lecture, hypothesis testing for population mean by Waqar Dar. It's question of hypothesis testing and you can solve by yourself after watching my lecture.
Sir g thats a two tailed case
Yes. It's a two tailed test.
sir please tell this that the single mean and population mean are same or not?
If you asking about topic name then single mean is actually representing population mean and for that we make interval using sample mean.
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@@waqardar4960 ok sir thank you so much
@@waqardar4960 sure why not
Assalam o alaikum sir! Please mujhe notes bhejdein inter k
W/S. I will. ASAP. Out of town.
❤
How see z tabel
Use Z distribution Table from the book. Or simply you can Google
You can buy statistical table book from bookshop
Sir kuch question ha jo mju smj ni aa rha plz mju smja da
You can send on email.
Slm sir g baz q my s laka ya ya be wasi ha
Apky qns ki smjh nae aii
Hlo sir
thank you🙏🙏🙏 sir
Thank you. Please share my lectures with your fellows