Chemistry 155 Introduction to Instrumental Analytical Chemistry
Chemistry 155 Introduction to Instrumental Analytical Chemistry
Chemistry 155 Introduction to Instrumental Analytical Chemistry
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Chem <strong>155</strong> Unit 1 Page 21 of 313Use this table:% confidence interval°freedom 50 80 95 991 1.00 3.08 12.71 63.662 0.82 1.89 4.30 9.923 0.76 1.64 3.18 5.844 0.74 1.53 2.78 4.605 0.73 1.48 2.57 4.036 0.72 1.44 2.45 3.717 0.71 1.41 2.36 3.508 0.71 1.40 2.31 3.369 0.70 1.38 2.26 3.2510 0.70 1.37 2.23 3.1720 0.69 1.33 2.09 2.8550 0.68 1.30 2.01 2.68100 0.68 1.29 1.98 2.63Use this formula:CIμ± ⋅ts ⋅ NNote the following:For a straight average of Npoints, the number ofdegrees of freedom is N-1.Complete the following table:Passenger T AVG (°F) Stdev(°F)1 101.5 1.1Lowerboundaryof 80%CIUpperboundaryof 80%CIIs the probability thatthe passenger’sTemp is > 102°90% or more?2 98.57 0.173 103.93 0.047Page 21 of 313
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