Posted by **trina** on Sunday, April 29, 2012 at 8:10pm.

Lorraine was in a hurry when she computed a confidence interval for . Because was not known, she used a Student's t distribution. However, she accidentally used degrees of freedom n + 1 instead of n - 1. v Will her confidence interval be longer or shorter than one found using the correct degrees of freedom n - 1?

Answer

a.

shorter

b.

longer

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