one tailed test or two test?
The question is "Some guy on the internet designed a weight-loss program. You are wondering if it is working. You are given a sample of some people who did the program"
according to the solution given, this is a one tailed test. but my question is this: why isn't it a two tailed test
we can have a null hypothesis as
H0 : The weight loss program IS working
h1: the weight loss program IS NOT workingwont that be correct? and if so, then this makes it a two tailed test
Hi Moffat,
Considering that we're interested only in the weight loss outcome and not in the weight gain outcome, I'd say this is a one-tailed test. The weight loss program decreases people's weight or it doesn't.
Best,
Ned
Mr Ned, I hope that you answer my question.
shouldn't the null hypothesis be less than zero ( <0) as we are seeking the difference between before and after which indicates a negative figure?