0.8705 (0.8713 , 0.4908) [0.7934 to 0.9142] 0.1295 (0.4908 , -0.8713) Test vector: Sigma = 0.3380 [0.2509 to 0.4707] 0.8688 (0.8944 , 0.4472) [0.7908 to 0.9130] 0.1312 (-0.4472 , 0.8944) 4