Hello there,
I have the following issue in understanding the concept:
> when you calculate the t value for a 1 sample t test you divide the numerator by the standard error of the sampling distribution based on the sample.
> when you calculate the t value for a 2 sample t test you divide the numerator by the two standard errors of the sampling distributions of the two samples.
WHY has the 2 sample t test two standard errors in the denominator? (Please don't answer "because there are two samples")
Regardless where I search online, they always explain how the 2 sample t test is calculated but not WHY ..
I attached a picture to make my question more clear ...
Many thanks in advance!
I have the following issue in understanding the concept:
> when you calculate the t value for a 1 sample t test you divide the numerator by the standard error of the sampling distribution based on the sample.
> when you calculate the t value for a 2 sample t test you divide the numerator by the two standard errors of the sampling distributions of the two samples.
WHY has the 2 sample t test two standard errors in the denominator? (Please don't answer "because there are two samples")
Regardless where I search online, they always explain how the 2 sample t test is calculated but not WHY ..
I attached a picture to make my question more clear ...
Many thanks in advance!
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