We wish to test the hypotheses HO: u 80 versus H1: H# 80 at a 14% level of significance. Here u denotes the average score X on a standardized test for students who have taken a preparation course for...

Extracted text: We wish to test the hypotheses HO: u 80 versus H1: H# 80 at a 14% level of significance. Here u denotes the average score X on a standardized test for students who have taken a preparation course for the exam. These hypotheses will be tested by obtaining a random sample of 600 student scores. If TS denotes (x-80) the test statistic where s is the sample standard deviation of the 600 V600 student scores, then the rejection rule may be stated as: Reject u = 80, if TS> 1.75 or TS <-1.75 o="" reject="" u="80," if="" ts=""> 1.96 O Reject u 80, if TS > 1.75 or TS <-1.75 reject="" u="80," if="" ts=""> 1.48 or TS <-1.48 reject="" u="" +="" 80,="" if="" ts=""> 1.48 or TS <>