The Confidence Limit The value oft depends on the desired confidence level and on the number of degrees of freedom (N-1) in the calculation of s. Table 2. Values of t for Various Levels of Probability Degrees Factor for Confidence Interval of 80% 90% 95 % 99% 99.9% Freedom 1 3.08 6.31 12.7 63.7 637 2 1.89 2.92 4.30 9.92 31.60 3 1.64 2.35 3.18 5.84 12.90 4 1.53 2.13 2.78 4.60 8.60 5 1.48 2.02 2.57 4.03 6.86 6 1.44 1.94 2.45 3.71 5.96 7 1.42 1.90 2.36 3.50 5.40 8 1.40 1.86 2.31 3.36 5.04 9 1.38 1.83 2.26 3.25 4.78 10 1.37 1.81 2.23 3.17 4.59 11 1.36 1.80 2.20 3.11 4.44 12 1.36 1.78 2.18 3.06 4.32 13 1.35 1.77 2.16 3.01 4.22 14 1.34 1.76 2.14 2.98 4.14 1.29 1.64 1.96 2.58 | AWN 8 Problems 2. Apply Q-test to the following set of data and determine whether the outlying result is retained or rejected at 95% probability level. What is the reported value after applying Q-Test? a) 41.27, 41.71, 41.84, 41.78 b)7.290, 7.284, 7.388, 7.292 . c) 85.10, 84.72, 84.70, 84.68