Z Test for the Mean

[YpUCLA23]

hey mr. perez im ms. perez, thanks for the help! lol

[Butch1982]

Wow, there is not a such thing as a stupid student. There is only good teacher or bad teacher....suddenly I understand everything!!!

[kamal008able]

its nice to see

[reja57]

you said previous video do you have any more regarding this kind of statistic meterial????

[reytristanjoshua]

I can't understand STEPS 2 and 3. :((

[76MGH]

Awesome video! Very clear and concise!

[76MGH]

Awesome video! Very clear and concise!

[asdfBruceasd]

great lesson, but i really cant stand charlie

[gnuochtapir]

Are all significance testing done with z scores? Like for example the One Way Anova?

[crisa81]

hi. is such a motivating video and very well presented, but i did not understand that 2.33 value. all z values from table 4 and 5 (4- Normal Dist Function, 5- percentage points of the ND) does not have this value. i am new student of this module, there fore my apologize for not being able to read a table ... but i just cant see that value

[MuchoMath]

@crisa81, The number 2.33 is a z-value or is sometime referred to as a z-score. The z-value on a table is usually found using the left column and top row on a Standard Normal Distribution Table. Depending on the type of table you are using, the area associated with a 2.33 z-value should be 0.4901 or 0.9901 if you are using a cumulative z-value table. Hope this helps.

[photek1944]

thanks for making this, really helped

[taragoodman]

great video but how did you get the critical value? table chart?

[tweakedmofo]

Very helpful video.

 thank you

[MuchoMath]

@tweakedmofo Thanks for stopping by! Best of luck to you!

[Metziut]

THanks a ton! I was totally lost before I watched this video!

[MuchoMath]

@Metziut Glad to hear that it helped!

[Talian1]

Great video. Hope you have one on T-tests.

[MuchoMath]

@Talian1 T-tests and p-value methods are coming sometime in the future.

[baroobaroo123]

thanks so much =D good video.

[farmcretin]

thanks for the videos!

my AP statistics test is in 3 days, and these videos helped enormously to get me ready.

[MuchoMath]

Thanks for stopping by farmcretin! Glad I could help! Good luck with your exam! Best of luck to you! MuchoMath

[aod412001]

U have clearly explained!!!!!!!

well done!!!!

[joevanosa]

this is so so nice but im done with my statistics! how baD!

[MuchoMath]

In the future there will be videos for highler level mathematics. Thanks for the comment and best of luck to you in those higher level courses. MuchoMath

[omfghelplol]

great vid, helped a bunch

[MuchoMath]

Thanks for the comment om. Glad I could help. I hope to have more of these stats vids in the near future. MuchoMath

[rassiter18]

thanks its so clear to me, very nice

[MuchoMath]

Glad I could help! Best of luck you. MuchoMath

[boialien]

I have a question, what if you're looking for a non-standard critical value such as 4%?

[MuchoMath]

If your looking at a non-standard distribution, then you may have to use a t-test distribution. I'm sorry but I don't have any of those videos yet :(

[warriorwithin96]

Im so happy ill just say it again. You are a bloody legend!

[MuchoMath]

Thanks warriorwithin96. Hope all is well with you and best of luck to you with your studies! MuchoMath

[warriorwithin96]

This is hilarious, i have been working my butt off to try and understand this area of stats (mainly finding the critical value) and my uni teachers always tell me to refer to the book (which to a right brained person such as myself, is in a paranormal language). So im stressing yeah, sitting in australia, and i find this kick-ass teacher on youtube who just completely helped me understand it. This guy is the reason ill pass stats this semester.. rock on bro! the world needs teachers like you

[shogunkata]

i'm from ireland and was having some problems with the very issues covered in your post. so thanks for cleaning up my problems.

[ilovepuppy1]

hi qianyi :D

[qianiy]

hi, love puppy!

haha

[MuchoMath]

Hey you two....go do some homework or something ;) MuchoMath

[foxgirl100]

where did 2.33 come from? i dont get it :(

[MuchoMath]

You need to find the area closest to 0.4900 using a Z-table (The Standard Normal Distribution).

[Waata]

Thank you from Christchurch, New Zealand. You should come and teach statistics here, I need more teachers like you.

Thanks alot.

[MuchoMath]

Waata, Thanks for your comment. Enjoyed your vids.....Never been to New Zealand myself but have some friends doing missionary work there. As for teaching math in New Zealand....this could be in my future. Best of luck to you. MuchoMath

[djangerbali]

You are right! So creative and attractive!

thanks

[MuchoMath]

Thanks for the comment djangerbali;).... I'm just trying a different approach. Best of luck to you! MuchoMath

[radbyx]

The most cool way I've every meet statistic!

I'm gonna all ur other vod's cus im going to exam in a university in denmark tomorrow :)

[MuchoMath]

radbyx, I hope things went well for you. I wish you the best and good luck with your studies.

[paolodonlagunzad]

Thanks....

[MuchoMath]

Your welcome! I am all about providing free math to students like yourself. You may find the free materials on my faculty website useful. Good luck with your studies!