One-Tailed vs Two-Tailed Hypothesis Tests | 2-sided vs lower and upper tails

[@mfstarbrandy]

Hi Joshua. This video was more helpful than the 2-hour class I sat in. Thank you!

[@Mitansh-e3i]

You help me to tech

[@ChandanG94805]

Me also can't understand left region or critical region😂

[@HarryPotter-pm5gr]

Thank you for this simple explanation ❤.

[@stevensilungwe41]

Hey I struggled on deciding whether it is single or double now that I have watched this video no more thank you . Asante sana

[@SunandMoon7-7]

thank you very much, ive been confused for past few day, and this video helped me a lot

[@joshemman]

Glad to hear. Thanks for the feedback.

[@princeisabel8594]

This came at the right time 🥺❤️ thank you

[@ambrosedugas6959]

So simple. So clear. Bless you lol!!!!!!

[@joshemman]

You're welcome, Ambrose. Bless you too.

[@gauravjain1653]

Very Well explained

[@rolaphilip]

This is the BEST explanation Than you

[@vinhkhanhhoang8623]

Really easy to understand. Thank you for your sharing

[@skkkk154]

Very well explained, thank you

[@joshemman]

My pleasure, sk. 😃

[@prukyyy]

thank you so much :)

[@sakshiwaykar4559]

Veryyyy helpful. Thankyou so much

[@joshemman]

Glad it was helpful!

[@aminatodunayo5179]

Thank you!! ♥️🥺

[@joshemman]

You’re welcome, Aminat😊

[@excitednaa9338]

Thank you!!!!!!!!!!!1

[@nadinemaarouf4996]

is the formula / critical score the same? so the only thing we are changing is the hypothesis?

[@joshemman]

The formula (test statistic) will not chnage. The critical value will change based on the tail(s) of the test.

[@nadofm]

@@joshemmanis this just for hypothesis tests using the Z score? For example, for a 95% confidence the t-value will be 0.05 for both one tail and two tail but this isnt the same case for z value?

[@joshemman]

@@nadofm Z and t work the same way. 95% confidence (two-tails) will have 0.025 in each tail. Whereas, for a one-tailed test, there is 0.05 in one tail.

[@deforcourage7087]

🎉

[@naziasvoice]

Is it one tailed or two tailed if trying to see something is more effective than the previous study?

[@joshemman]

"more effective" will be one tailed.

[@amitabhshukla5950]

Beautifully explained🎉

[@LeeMajikija]

This video is GREAT and simplified something so seemingly complicated. Thank you Teach Josh.