Consider the sample 71, 85, 77, 81, 80, 76, 72, 83, 78, 86 from a normal population with population mean μ and population variance o2. Find the 95% confidence interval for u. a) 78.90±5.18 Ob) 78.90±6.68 Oc) 78.90±5.12 d) 78.90+3.42 e) 78.90±3.64