z test critical value approach

[wssssf]

I don't understand how to find the cutoff z score like where the -2.326? I get everything up until that and what to do once you find that but how do you get that?

[Cool27Guy]

@wssssf thats the z-score of alpha

[IveGotThis]

You just taught in a 6 minute video what my professor has been trying to teach us for 2 weeks. Thanks for this, it really helped me out for my exam in a little bit.

[raohamza]

really helpful. thnxxx

[jjobrien9]

I wish my professor would teach like this. This is so clear!

[kimtheknight]

Saved my life~

[BTRUIIU]

I'm afraid I do not see the Z-Score of 2.326 anywhere on the Z-table or the T-table. Can you show me how you derived at this figure, please? Thanks!

[Forbidinh]

@BTRUIIU She is using the t-distribution table of 1% with an infinite degree of freedom.

[palmerc1985]

Very Helpful!! Couple Questions if you dont mind....Looking at the table 2.326 is at the bottom. When I look at 37 degrees of freedom it is 2.431. Is this also the way to find the critical value? and can I use the numbers at the bottom all the time or should I look with the degrees of freedom?

[kbQ1had]

How do I enter this into my TI-83 properly?

[sitnlo12]

Thank you so much for posting these videos. I am taking an intro to statistics class and my teacher is not very good(or doesn't care). :( I spend a lot of time with a tutor to make up the difference. WIth your help as well, I may do okay. Sure appreciate you break the info down and the way you teach this! :)

[priscillialeslie]

very very helpful. I am french and I didnt understand when it was explained in french but now its clearrrrrrrrr!!!!!!!!!! thx

[irfaanfr1]

this is quality

[tcreelmuw]

@Kissiq1618 It should not be that different. Remember, you are looking for the z-score, not the probability.

[dAshtonNick]

thank you sooo sooo much!! this was really helpful.

[2415Jan]

you should put a dvd together... best explanation ever

[fifsterr]

Your videos really help a lot !!! Wish I had you as my teacher LOL

[ererer41]

MILF

[ronaldrayers]

@ererer41 I had to watch a different video to learn anything....nice ta' tas

[spankeyssnakehut]

Your so ridiculously better than my 'professor' !!! keep up the awesome videos:D

[illustriousceegod7]

Your video was very helpful. Thanks.

[littlemelbaby89]

I'm in an online stats class at the university of phoenix and let me tell you, all week i have been pulling my hair out, slamming fists on my desk, etc trying to figure this stuff out and bombed a quiz twice. this video, along with the video about the t-test critical value approach, helped me earn a 93% on that quiz...THANK YOU, THANK YOU, THANK YOU!! :)

[jim8z3]

really helpful - fantastic boobies aswell!

[animez89]

i think critical value came from t distribution under .01 in one sided p

[Klendathue]

I did the test statistic calculation myself and I also got -2.86 (-2.85652 rounded to hundredths). 37.5-38=-0.5 and 1.2/SQRT(47) = 0.175, -0.5/0.175=-2.86. When I looked at the z table for the z value at 0.01 I used 0.0099, which showed -2.33. She had a more exact value for the critical z value, but I don't think it matters for the classroom. The -2.86 is still < than -2.33 (its more negative, further to the left on the ol' number line).

[JunareG]

actually, it has a z score of 2.356

[cooltobehip]

You deserve a bigger whiteboard.

[DaHiddenWarrior]

This was helpful, but I got confused with the z value?!

[karmooooooosh]

Thank u, it is so helpful god bless u :)

[originaldeadman23]

Great lecture/lesson!!...thank you!!.however i have a question regarding the Z-score value that you found which is -2.86 according to ur calculation..however when i do it mine comes up to -0.2856? could you or someone explain that please. thanks

[jamesscottemail]

I do not know what book you are referring in this tutorial series. Superb lectures and there should be more tutorials on the other topics/statistics by the same professor. My rating 5 stars

[andruw666]

super super super helpful!!! thank you!

[sarikaravi]

I mean to say .01 is equals to what?

How can i find the is .01 equal value in table

[pilot233a]

0.01 = 99% Confidence Level

[sarikaravi]

thanks. but can u plz tell me that how u find the value of alpha?

[123zangemadrese123]

alpha is given

[tcreelmuw]

@sarikaravi You are usually told what alpha is.

[memo5279]

@sarikaravi where can i find the table for the p-value

[rehacaz]

Great video. Thx.