A Two Tail hypothesis Testing Example.wmv 

My online class on behavioral research statistics did not explain this process nearly as well as this video does. Thank you so much for the help. This is a great resource and I will recommend this to be used by my classmates as well.

Mr. Kaplan, you are an exceptional teacher. I totally understand the process now. You ROCK :)!

I would really really want to thank you from the bottom of my heart that your tutorial is really helpful, definitely the best thing ever I have found, very easy to understand the whole concept, better than my professor, I attended all his lectures but could never been better to see this clip for less than 15 minutes! Thanks! : )

Perfectly done and easy to understand. You made it so clear to me because you didn't over complicate it. Thank you so much.

Excellent presentation.. you’re very organized which makes it easy to follow you through the process. Thanks..

very clearly!!! oh how clear it is? Punky! think to some teachers at my school just sit there and click click click the slides!!!! thanks a lot for your teaching sir!

Thankyou so much! you are the first person to explain this to me and it actually make sense!

sadly i'm seeing this video after i did my finals today :( and now i totally understand

You switched your labels for the null and alternate hypotheses. H-0 is the null, and H-1 is the alternate.

I haven't even taking statistics yet I'm just trying to teach myself but your videos basically teches me everything and your so good with detail thanks man your realy helping me out!

Simple and straight to the point!

Just awesome sir... keep moving on uploading more videos.

He is subtracting 1-0.9664 = 0,0336 ( the number you find in table A2 when you look up the test statistic 1.83)

Thanks for the video helping me a lot in 2019.

Correction to below for P-value: where did .5 come from? shouldn't it be .05 - .4664??

For the X values: for -1.645 I calculated 44,998.4. And for the X value for 1.645, I got 45,001.6.

you solved my problem. your a champ sir

the 0.5 is half the bell curve. because the whole curve equals 1.so from the mean (half the curve) is 1/2 of 1 or the 0.5 he mentioned .

Thanks, great example

great work mate.

Thank you so much, this is a helpful video, appreciation

you are extremely good

OMG completely understand after the video

thanks. it is clear to me now

Thank you sir ❤

Thank you a lot!

amazing stuff, good video

where did .5 come from??? Thought the rejection region for two-tailed test would be .025

i am absolutely fuck, tomorrow is the midterm and i know nothing memtioned in this video.

Professor, Could you please comment: When finding the p-value, you stated 1.83 is ".4664"? I see the z-score at ".9664" on the table & if you do 1-.9664, the answer is 0.0336, just the same as when you used ".5-.4664=0.0336". Is there a reason you subtracted .5 initially from .9664 to use ".4664"? Thank you in advance.

Z - value represents the area under the curve

I lost contact with reality at 10:25. What??????????????????

thaaaaaaaaaaaaaaaaaaaaaaaank you sooooo much ur wonderful thats the first time i understand this and ready for solving problems !!! :) :*

awesome clip

thank you sir..its help a lot..

I found it helpful, thank you :)

Thank you!!!

thanks!

Would you fail to reject because the p-value is less than the alpha?

Did anyone else notice he took the mean in 1.83 on z table, as .4664 but my table said 46.64. What's the difference you ask? two decimal places. How can I calculate the right answer if he's jumping around making conversions and not telling us why? If this is a blooper, let me know peeps. It's about at 10:25

Thanks, very helpful :)

Michael Stuhlbarg is that you?

If you had a negative z score would you still go 0.05-the z score?

good one... thnx

very very helpful video but could you please explain to me how you calculate or see the critical value on the z-table. I didn't really understand the 0,45... and with a 5% confidence is the critical value still 1,645?if not, how do you calculate that?thaanks

what graphs are you using? i don't understand how to use them, the graphs in my book have different numbers...

how did you rearrange the equation to solve for x?

for the p-value where did you get .05 from?

sir ,what if i take [z]>1.645 and whatabout using the ppln sd,is it correct?

what are the o.5- o.4664 from where did u get them?

teacher i come from thailand i want know chi-square distribution

it is not z value it is t value xbar-u/s/sqrt(n) ~t(n-1

damla seni seviyorum

Sir you should be using a t-test not a z-test because you have the S and not the sigma! @ProfessorKaplan

Totally failed