Performing a t-test in GraphPad Prism

[@prashantkumar-ml9hf]

Thank you so much sir. It was a very simple yet highly informative representation to use t-test.

[@DoryVideo]

My pleasure

[@RiaCaringal]

Thank you for explaining so well!

[@vipindan1279]

Beautifully explained and very clear .. thank you soo much

[@DoryVideo]

Always a pleasure

[@avenasativa1671]

Can one perform a t-test if the SD in not equal between groups tested? I’ve noticed that the p value for the F test to compare variances in your example is statistically significant. I’ve encountered this problem while analyzing my results and I’m not sure if I can use a test that has an assumption of equal SD. Thank you for a nice presentation

[@acesin-et7pp]

Thanks One question, My "P value summary" is ***, but "F test to compare variances" " P value summary" is shown as ns. What does that mean? Please reply this. Thanks

[@Ahmed.Elsaied]

Nicely explained and easy to follow

[@DoryVideo]

Thanks

[@sivasankar372]

you have done nice work. well done

[@DoryVideo]

Thanks!

[@hafsaqadri4088]

Thanks a ton ! Nicely explained.

[@DoryVideo]

Thanks

[@arkagupta7502]

This is a life saver, thank you.

[@DoryVideo]

My pleasure!

[@alina.m4lina]

How do you find cohen's d of the t test?

[@WalkaboutLondonandtheUK]

Very useful indeed!

[@neetithakur2021]

If I have more treated group than how to calculate

[@kulsoomjaved1164]

Really thankful

[@DoryVideo]

Great!

[@olgamukha262]

What does "These two values represent an N of eight to study where we have produced eight replicates of the experimental outcome" mean?

[@DoryVideo]

It means n=8. The experiment was repeated 8 times

[@春芳郭-z6t]

Thans a lot, sir.

[@DoryVideo]

My pleasure!

[@sebooz4949]

we use 2 groups to perform t test but here there are more than 2 columns , why?_

[@DoryVideo]

A t test compares two columns of data, and the test you are undertaking should be hypothesis-led, in other words you should have a question of your data that requires the comparison of two groups. You should not run multiple t-tests if you have more then two groups, for this you need to run an ANOVA.

[@lwinterbourne1730]

shouldn't you put *** based on the results of your t-test? In the video you only put one * level of significance in the figure.

[@DoryVideo]

That’s not always the case, it depends what you set your alpha to, if you set alpha to 0.05 at the start any p value lower than 0.05 is significant, irrespective of how small it is.

[@lwinterbourne1730]

@@DoryVideo Thank you so much for answering!!! Sorry, in your video results from Graph Pad, the p-value summary I believe is "***", highly significant (*** P ≤ 0.001), but in your graphic you only include one * (* P ≤ 0.05). Perhaps I am misunderstanding something.

[@drshinwarishinwari1253]

Thank you so much sir

[@DoryVideo]

My pleasure

[@saptamitagoswami5227]

Thank you

[@DoryVideo]

My pleasure

[@nogaali2274]

Thanks 👍

[@DoryVideo]

My pleasure, plenty more handy tutorials on my channel :-)

[@nogaali2274]

@@DoryVideo very nice
I love it

[@tatianaperez1548]

ty!

[@aftabshaukat9407]

very nice sir

[@DoryVideo]

Thanks!

[@danielmacedomacedo9282]

thanks!

[@DoryVideo]

My pleasure

[@mohannadalobid6894]

Hello all m please i need help
I am new on this software. I have those variables and i need to enter them into prism for analysis any help and suggestions? Thanks in advance
Year
X< Renewable water resources (m3 per capita year-1)
Agriculture, forestry, and fishing, value added (% of GDP)
GDP (current US$)
Population (one Million)
per capita net water export m3 rice crop
per capita net water import for maize and wheat crops m3 rice crop

[@DoryVideo]

Decide what the independent and dependent variables are and you should be able to work out what you need to plot from that.

[@myclub6258]

Hey Bro, meet a boss doing PhD in your institution. His name is Martino. Thank You. You would love to learn some skills from him. Thank you.

[@DoryVideo]

Maybe one day!