Last answered:

23 Dec 2021

Posted on:

25 Oct 2021


What Is Sample Size >50 and population/sample variance is unknown?

What happens when no sample >50, and population variance is unknown, how to find the CI intervals?

1 answers ( 0 marked as helpful)
Posted on:

23 Dec 2021


Hello Purnendu!

Thanks for reaching out!

In most cases you will probably end up with the same. Why?

Because  as the degrees of freedom approach infinity, a t distribution approaches a normal distribution.

In any case I suggest you use the t-stat since this is the case when the pop var is unknown.

The 365 Team

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