A competency test is modified so that the proportion of test-takers that pass is more than 75% A simple random sample of test-takers is collected to determine if the proportion of passers is greater than 75%. The results of the sample are shown below Competency test sample passed 80 Observations 100 Confidence Level 0.9 Critical value 1.28 test statistic (z) 1.15 p-value 0.124 p-value - Ex: 1 234 Z Ex 1 234 n= EX: 9 Number passed = Ex 9 Sample proportion p EX: 1 234