Last answered:

04 Dec 2023

Posted on:

01 Oct 2023


Why we use T statistice?

Why don't you use z-statistics?
Aren't all sales in 2016 not in the US?
If we want to think about the scale of 2016 for the United States, I think we should use ZStatistics because we have all the sales for 2016 in the United States.

1 answers ( 0 marked as helpful)
Posted on:

04 Dec 2023


Because it's a sample of 30 years of sales

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