Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 3

Critical Thinking 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 instead of n - 1. Was her confidence interval longer or shorter than one found using the correct degrees of freedom n - 1 Explain.