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jbryer / DATA606Fall2017

DATA 606 - Statistics and Probability for Data Analytics
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t-scores and z-scores #21

Open swigodsky opened 6 years ago

swigodsky commented 6 years ago

I am confused about when to calculate a t-score and when to calculate a z-score. In question 5.19, I thought I should use a t-score, but the answer in the back of the book calculated a z-score. Is that because there are 200 samples, and that is much more than 30? Please let me know how I could better figure out when to use each type of table. Thanks, Sarah

jbryer commented 6 years ago

We'll talk about that tonight.

On Sun, Oct 22, 2017 at 2:09 PM, swigodsky notifications@github.com wrote:

I am confused about when to calculate a t-score and when to calculate a z-score. In question 5.19, I thought I should use a t-score, but the answer in the back of the book calculated a z-score. Is that because there are 200 samples, and that is much more than 30? Please let me know how I could better figure out when to use each type of table. Thanks, Sarah

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