Why in the video we calculate Before-After, but in the exercise we calculate After-Before? I don't understand why we don't calculate the weight before minus the weight after

I think in the exercise, they wanted to be as much as precise. i.e. "you lost -x weight" like getting minus value from your weight is losing weight. Anyway, you would do it the other way (before - after) you will get the same result as this one-sided testing. Hope this explains. I also had hard time to consume these concepts, I did my extra research on youtube etc. and I was able to understand a bit more.

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Mostafa Mouawie

Last answered:

11 Apr 2022

Posted on:

25 Feb 2022

About the exercise, calulcating the difference

in Statistics / Test for the mean. Dependent samples

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Timur Abdukarimov

Posted on:

11 Apr 2022

About the exercise, calulcating the difference

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