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27 Statistical Analysis Outputs A P P E N D I X B Hot Water 3 days 2 340.650 22.056 290.75 390.55 MIST 1000 cycles 3 377.367 18.009 336.63 418.11 MIST 2000 cycles 3 246.467 18.009 205.73 287.21 Moisture Conditioning Protocols Figure 14. MR stiffness results. Missing Rows 1Excluded Rows 15 One-way Anova Summary of Fit Rsquare 0.87698 Adj Rsquare 0.822304 Root Mean Square Error 31.19243 Mean of Response 352.0143 Observations (or Sum Wgts) 14 Analysis of Variance Source DF Sum of Squares Mean Square F Ratio Prob > F Column 1 4 62424.285 15606.1 16.0397 0.0004* Error 9 8756.712 973.0 C. Total 13 71180.997 Means for One-way Anova Level Number Mean Std Error Lower 95% Upper 95% AASHTO T283 3 345.467 18.009 304.73 386.21 Dry Control 3 446.333 18.009 405.59 487.07
28 Std Error uses a pooled estimate of error variance Means Comparisons Comparisons for each pair using Student's t Confidence Quantile t Alpha 2.26216 0.05 LSD Threshold Matrix Abs(Dif)-LSD Dry Control MIST 1000 cycles AASHTO T283 Hot Water 3 days MIST 2000 cycles Dry Control -57.61 11.35 43.25 41.27 142.25 MIST 1000 cycles 11.35 -57.61 -25.71 -27.70 73.29 AASHTO T283 43.25 -25.71 -57.61 -59.60 41.39 Hot Water 3 days 41.27 -27.70 -59.60 -70.56 29.77 MIST 2000 cycles 142.25 73.29 41.39 29.77 -57.61 Positive values show pairs of means that are significantly different. Connecting Letters Report Level Mean Dry Control A 446.33333 MIST 1000 cycles B 377.36667 AASHTO T283 B 345.46667 Hot Water 3 days B 340.65000 MIST 2000 cycles C 246.46667 Levels not connected by same letter are significantly different. Ordered Differences Report Level - Level Difference Std Err Dif Lower CL Upper CL p-Value Dry Control MIST 2000 cycles 199.8667 25.46852 142.253 257.4805 <.0001* MIST 1000 cycles MIST 2000 cycles 130.9000 25.46852 73.286 188.5138 0.0006* Dry Control Hot Water 3 days 105.6833 28.47467 41.269 170.0975 0.0048* Dry Control AASHTO T283 100.8667 25.46852 43.253 158.4805 0.0033* AASHTO T283 MIST 2000 cycles 99.0000 25.46852 41.386 156.6138 0.0037* Hot Water 3 days MIST 2000 cycles 94.1833 28.47467 29.769 158.5975 0.0091* Dry Control MIST 1000 cycles 68.9667 25.46852 11.353 126.5805 0.0241* MIST 1000 cycles Hot Water 3 days 36.7167 28.47467 -27.698 101.1308 0.2294 MIST 1000 cycles AASHTO T283 31.9000 25.46852 -25.714 89.5138 0.2419 AASHTO T283 Hot Water 3 days 4.8167 28.47467 -59.598 69.2308 0.8694 Figure 15. IDT strength results.
29 Excluded Rows 15 One-way Anova Summary of Fit Rsquare 0.823079 Adj Rsquare 0.75231 Root Mean Square Error 4.502962 Mean of Response 79.78 Observations (or Sum Wgts) 15 Analysis of Variance Source DF Sum of Squares Mean Square F Ratio Prob > F Column 1 4 943.3173 235.829 11.6306 0.0009* Error 10 202.7667 20.277 C. Total 14 1146.0840 Means for One-way Anova Level Number Mean Std Error Lower 95% Upper 95% AASHTO T283 3 76.9333 2.5998 71.141 82.726 Dry Control 3 91.2667 2.5998 85.474 97.059 Hot Water 3 days 3 82.7333 2.5998 76.941 88.526 MIST 1000 cycles 3 81.0000 2.5998 75.207 86.793 MIST 2000 cycles 3 66.9667 2.5998 61.174 72.759 Std Error uses a pooled estimate of error variance Means Comparisons Comparisons for each pair using Student's t Confidence Quantile t Alpha 2.22814 0.05 LSD Threshold Matrix Abs(Dif)-LSD Dry Control Hot Water 3 days MIST 1000 cycles AASHTO T283 MIST 2000 cycles Dry Control -8.192 0.341 2.075 6.141 16.108 Hot Water 3 days 0.341 -8.192 -6.459 -2.392 7.575 MIST 1000 cycles 2.075 -6.459 -8.192 -4.125 5.841 AASHTO T283 6.141 -2.392 -4.125 -8.192 1.775 MIST 2000 cycles 16.108 7.575 5.841 1.775 -8.192 Positive values show pairs of means that are significantly different. Connecting Letters Report Level Mean Dry Control A 91.266667 Hot Water 3 days B 82.733333 MIST 1000 cycles B 81.000000 AASHTO T283 B 76.933333 MIST 2000 cycles C 66.966667 Levels not connected by same letter are significantly different. Ordered Differences Report Level - Level Difference Std Err Dif Lower CL Upper CL p-Value Dry Control MIST 2000 cycles 24.30000 3.676653 16.1079 32.49209 <.0001* Hot Water 3 days MIST 2000 cycles 15.76667 3.676653 7.5746 23.95876 0.0016*
30 Level - Level Difference Std Err Dif Lower CL Upper CL p-Value Dry Control AASHTO T283 14.33333 3.676653 6.1412 22.52543 0.0030* MIST 1000 cycles MIST 2000 cycles 14.03333 3.676653 5.8412 22.22543 0.0034* Dry Control MIST 1000 cycles 10.26667 3.676653 2.0746 18.45876 0.0190* AASHTO T283 MIST 2000 cycles 9.96667 3.676653 1.7746 18.15876 0.0219* Dry Control Hot Water 3 days 8.53333 3.676653 0.3412 16.72543 0.0427* Hot Water 3 days AASHTO T283 5.80000 3.676653 -2.3921 13.99209 0.1458 MIST 1000 cycles AASHTO T283 4.06667 3.676653 -4.1254 12.25876 0.2946 Hot Water 3 days MIST 1000 cycles 1.73333 3.676653 -6.4588 9.92543 0.6474 Figure 16. APA RRP results. Missing Rows 5Excluded Rows 15 One-way Anova Summary of Fit Rsquare 0.963816 Adj Rsquare 0.934869 Root Mean Square Error 0.891579 Mean of Response 7.1205 Observations (or Sum Wgts) 10 Analysis of Variance Source DF Sum of Squares Mean Square F Ratio Prob > F Column 1 4 105.86866 26.4672 33.2957 0.0008* Error 5 3.97456 0.7949 C. Total 9 109.84322 Means for One-way Anova Level Number Mean Std Error Lower 95% Upper 95% AASHTO T283 2 12.3000 0.63044 10.679 13.921 Dry Control 2 2.7650 0.63044 1.144 4.386 Hot Water 3 days 2 4.8750 0.63044 3.254 6.496 MIST 1000 cycles 2 7.0950 0.63044 5.474 8.716 MIST 2000 cycles 2 8.5675 0.63044 6.947 10.188 Std Error uses a pooled estimate of error variance Means Comparisons Comparisons for each pair using Student's t Confidence Quantile t Alpha 2.57058 0.05
31 LSD Threshold Matrix Abs(Dif)-LSD AASHTO T283 MIST 2000 cycles MIST 1000 cycles Hot Water 3 days Dry Control AASHTO T283 -2.2919 1.4406 2.9131 5.1331 7.2431 MIST 2000 cycles 1.4406 -2.2919 -0.8194 1.4006 3.5106 MIST 1000 cycles 2.9131 -0.8194 -2.2919 -0.0719 2.0381 Hot Water 3 days 5.1331 1.4006 -0.0719 -2.2919 -0.1819 Dry Control 7.2431 3.5106 2.0381 -0.1819 -2.2919 Positive values show pairs of means that are significantly different. Connecting Letters Report Level Mean AASHTO T283 A 12.300000 MIST 2000 cycles B 8.567500 MIST 1000 cycles B C 7.095000 Hot Water 3 days C D 4.875000 Dry Control D 2.765000 Levels not connected by same letter are significantly different. Ordered Differences Report Level - Level Difference Std Err Dif Lower CL Upper CL p-Value AASHTO T283 Dry Control 9.535000 0.8915787 7.24312 11.82688 0.0001* AASHTO T283 Hot Water 3 days 7.425000 0.8915787 5.13312 9.71688 0.0004* MIST 2000 cycles Dry Control 5.802500 0.8915787 3.51062 8.09438 0.0013* AASHTO T283 MIST 1000 cycles 5.205000 0.8915787 2.91312 7.49688 0.0021* MIST 1000 cycles Dry Control 4.330000 0.8915787 2.03812 6.62188 0.0046* AASHTO T283 MIST 2000 cycles 3.732500 0.8915787 1.44062 6.02438 0.0086* MIST 2000 cycles Hot Water 3 days 3.692500 0.8915787 1.40062 5.98438 0.0090* MIST 1000 cycles Hot Water 3 days 2.220000 0.8915787 -0.07188 4.51188 0.0552 Hot Water 3 days Dry Control 2.110000 0.8915787 -0.18188 4.40188 0.0642 MIST 2000 cycles MIST 1000 cycles 1.472500 0.8915787 -0.81938 3.76438 0.1595 Specimen-Drying Methods Figure 17. MR stiffness results. Excluded Rows 18 One-way Anova Summary of Fit Rsquare 0.39387 Adj Rsquare 0.166572 Root Mean Square Error 30.32215 Mean of Response 318.5417 Observations (or Sum Wgts) 12
32 Analysis of Variance Source DF Sum of Squares Mean Square F Ratio Prob > F Column 1 3 4779.669 1593.22 1.7328 0.2374 Error 8 7355.460 919.43 C. Total 11 12135.129 Means for One-way Anova Level Number Mean Std Error Lower 95% Upper 95% Air Dry 3 294.367 17.506 254.00 334.74 CoreDry 3 329.000 17.506 288.63 369.37 Oven Dry 24 hours 3 305.333 17.506 264.96 345.70 Saturated-Surface Dry 3 345.467 17.506 305.10 385.84 Std Error uses a pooled estimate of error variance Means Comparisons Comparisons for each pair using Student's t Confidence Quantile t Alpha 2.30600 0.05 LSD Threshold Matrix Abs(Dif)-LSD Saturated- Surface Dry CoreDry Oven Dry 24 hours Air Dry Saturated- Surface Dry -57.092 -40.625 -16.959 -5.992 CoreDry -40.625 -57.092 -33.425 -22.459 Oven Dry 24 hours -16.959 -33.425 -57.092 -46.125 Air Dry -5.992 -22.459 -46.125 -57.092 Positive values show pairs of means that are significantly different. Connecting Letters Report Level Mean Saturated-Surface Dry A 345.46667 CoreDry A 329.00000 Oven Dry 24 hours A 305.33333 Air Dry A 294.36667 Levels not connected by same letter are significantly different. Ordered Differences Report Level - Level Difference Std Err Dif Lower CL Upper CL p-Value Saturated-Surface Dry Air Dry 51.10000 24.75793 -5.9919 108.1919 0.0729 Saturated-Surface Dry Oven Dry 24 hours 40.13333 24.75793 -16.9586 97.2252 0.1437 CoreDry Air Dry 34.63333 24.75793 -22.4586 91.7252 0.1994 CoreDry Oven Dry 24 hours 23.66667 24.75793 -33.4252 80.7586 0.3671 Saturated-Surface Dry CoreDry 16.46667 24.75793 -40.6252 73.5586 0.5247 Oven Dry 24 hours Air Dry 10.96667 24.75793 -46.1252 68.0586 0.6695 Figure 18. IDT strength results.
33 Excluded Rows 18 One-way Anova Summary of Fit Rsquare 0.409828 Adj Rsquare 0.188514 Root Mean Square Error 7.010706 Mean of Response 76.56667 Observations (or Sum Wgts) 12 Analysis of Variance Source DF Sum of Squares Mean Square F Ratio Prob > F Column 1 3 273.04667 91.0156 1.8518 0.2161 Error 8 393.20000 49.1500 C. Total 11 666.24667 Means for One-way Anova Level Number Mean Std Error Lower 95% Upper 95% Air Dry 3 74.9667 4.0476 65.633 84.301 CoreDry 3 83.8000 4.0476 74.466 93.134 Oven Dry 24 hours 3 70.5667 4.0476 61.233 79.901 Saturated-Surface Dry 3 76.9333 4.0476 67.599 86.267 Std Error uses a pooled estimate of error variance Means Comparisons Comparisons for each pair using Student's t Confidence Quantile t Alpha 2.30600 0.05 LSD Threshold Matrix Abs(Dif)-LSD CoreDry Saturated- Surface Dry Air Dry Oven Dry 24 hours CoreDry -13.200 -6.333 -4.367 0.033 Saturated- Surface Dry -6.333 -13.200 -11.233 -6.833 Air Dry -4.367 -11.233 -13.200 -8.800 Oven Dry 24 hours 0.033 -6.833 -8.800 -13.200 Positive values show pairs of means that are significantly different. Connecting Letters Report Level Mean CoreDry A 83.800000 Saturated-Surface Dry A B 76.933333 Air Dry A B 74.966667 Oven Dry 24 hours B 70.566667 Levels not connected by same letter are significantly different. Ordered Differences Report Level - Level Difference Std Err Dif Lower CL Upper CL p-Value CoreDry Oven Dry 24 hours 13.23333 5.724218 0.0333 26.43340 0.0495* CoreDry Air Dry 8.83333 5.724218 -4.3667 22.03340 0.1614 CoreDry Saturated-Surface Dry 6.86667 5.724218 -6.3334 20.06674 0.2646 Saturated-Surface Dry Oven Dry 24 hours 6.36667 5.724218 -6.8334 19.56674 0.2983 Air Dry Oven Dry 24 hours 4.40000 5.724218 -8.8001 17.60007 0.4642 Saturated-Surface Dry Air Dry 1.96667 5.724218 -11.2334 15.16674 0.7400
Abbreviations and acronyms used without definitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACIâNA Airports Council InternationalâNorth America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing Americaâs Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) TCRP Transit Cooperative Research Program TDC Transit Development Corporation TEA-21 Transportation Equity Act for the 21st Century (1998) TRB Transportation Research Board TSA Transportation Security Administration U.S.DOT United States Department of Transportation
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