Hypothesis Test for Variance

[@theodoresweger4948]

Welldone and well illistrated, Thank you...

[@majjoor]

OMG this is so perfectly explained!

[@agop18]

Thank you!

[@matthaselhorst542]

I haven't studied or looked at any material on this with an exam in an hour and after watching this i feel its gonna be cake

[@MoonlitPhoenix0]

Was it cake?

[@maths2bsquared172]

What book are u using together with the chapter

[@ivosilva2796]

Im probably a bit late, can you explain why you chose that test statistic ?

[@loureenvillarosa223]

does the sample variance doesn't need to be squared?

[@agop18]

No, you only square if the value the question gives you is the standard deviation. If the question gives you the sample variance, you don't need to square it!

[@Miguel-kx3ri]

Hi sorry I don't really get how do you obtain the degrees of freedom

[@elledgeca]

For this test the degrees of freedom is n-1, the sample size minus one.

[@Miguel-kx3ri]

oh thanks!!

[@haretztj4682]

would that be -1.735 or 1.735? Since its on the left side of the bell curve. Eitherway the test statistics is still at the non rejection region but still, i need to know

[@mohammedhisham6030]

This applies for distributions that are symmetric on both sides like the normal distribution or the t distribution. Chi squared is not.

[@egehancanoz7816]

perfectt

[@TheRandomQueen]

Apriciated

[@ayeshaeshal6047]

How would i know that the DF is 9, please answer my comment, tomorrow is my exam

[@twosigma1371]

For this test the degrees of freedom is the sample size minus one. So for this example, the sample size was 10 and the degrees of freedom is 9.

[@ayeshaeshal6047]

@@twosigma1371 thank you so much, now i'm fully done with my preparation. Thanks a lot for your reply, i'm from Bangladesh, take love.

[@mindacid3274]

perfect111

[@bakshindersingh9526]

chl samar pagal ha