What is the critical t-value for finding a 90% confidence interval estimate from a sample of 15 observations? Naim 10:01 AP Statistics Chapter 11 What is the critical t-value for finding a 90% confidence interval estimate from a sample of 15 observations? (A) 1.341 (B) 1.345 (C) 1.350 (D) 1.753 (E) 1.761 Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+