Index Comparisons
Heavy and Light Rail Composite Input Costs Indexes versus The Producer Price Index (PPI)
Tested Variables:
Total Heavy Rail Index
Total Light Rail Index
Heavy Rail Cost Index -- Total, (HR)
Percent Change Tests, Interval Q, 85:2 to 94:2
AVG(%(HR)) = 0.6
AVG(%(PPI)) = 0.4
STDDEV(%(HR)) = 0.224
STDDEV(%(PPI)) = 1.055
CORRELATION VECTOR ------------------
DATED QUARTERLY(1985:2 TO 1994:2)
(0)
0) %(HR) 1.000 1) %(PPI) 0.132
ORDINARY LEAST SQUARES ----------------------
QUARTERLY(1985:2 TO 1994:2) 37 OBSERVATIONS DEPENDENT VARIABLE: %(HR)
COEFFICIENT STD. ERROR T-STAT INDEPENDENT VARIABLE
0.605843 0.03795 15.96 CONSTANT
1) 0.0338945 0.03360 1.009 %(PPI)
2) 0.129336 0.05611 2.305 +0.98*SEASONQ1+0.02*SEASONQ2- 0.20*SEASONQ3-0.80*SEASONQ4
R-BAR SQUARED: 0.1002 DURBIN-WATSON STATISTIC: 0.9922 STANDARD ERROR OF THE REGRESSION: 0.2150 NORMALIZED: 0.3468
Percent Changes, Heavy Rail Cost Index (HR) Solid Line, PPI Shaded Line
Heavy Rail Cost Index -- Total
Level Tests, Interval Q, 85:1 to 94:2
CORRELATION VECTOR ------------------
DATED QUARTERLY(1985:1 TO 1994:2)
(0)
0) #HR 1.000 1) #PPI 0.961
ORDINARY LEAST SQUARES ----------------------
QUARTERLY(1985:1 TO 1994:2) 38 OBSERVATIONS DEPENDENT VARIABLE: #HR
COEFFICIENT STD. ERROR T-STAT INDEPENDENT VARIABLE
-0.0391359 0.05583 -0.7010 CONSTANT
1) 1.08382 0.05183 20.91 #PPI
R-BAR SQUARED: 0.9218 DURBIN-WATSON STATISTIC: 0.3313 STANDARD ERROR OF THE REGRESSION: 0.02183 NORMALIZED: 0.01939
Levels, Heavy Rail Cost Index (#HR) Solid Line, PPI Shaded Line
Light Rail Cost Index -- Total, (LR)
Percent Change Tests, Interval Q, 85:2 to 94:2
AVG(%(LR)) = 0.7
AVG(%(PPI)) = 0.4
STDDEV(%(LR)) = 0.302
STDDEV(%(PPI)) = 1.055
CORRELATION VECTOR ------------------
DATED QUARTERLY(1985:2 TO 1994:2)
(0)
0) %(LR) 1.000 1) %(PPI) -0.017
ORDINARY LEAST SQUARES ----------------------
QUARTERLY(1985:2 TO 1994:2) 37 OBSERVATIONS DEPENDENT VARIABLE: %(LR)
COEFFICIENT STD. ERROR T-STAT INDEPENDENT VARIABLE
0.661434 0.04672 14.16 CONSTANT
1) 0.0107239 0.04141 0.2590 %(PPI)
2) 0.296483 0.07814 3.794 +0.64*SEASONQ1+0.36*SEASONQ2- 0.16*SEASONQ3-0.84*SEASONQ4
R-BAR SQUARED: 0.2563 DURBIN-WATSON STATISTIC: 1.0322 STANDARD ERROR OF THE REGRESSION: 0.2644 NORMALIZED: 0.3954
Percent Changes, Light Rail Cost Index -- Total, (LR) Solid Line, PPI Shaded Line
Light Rail Cost Index -- Total, (LR)
Level Tests, Interval Q, 85:1 to 94:2
CORRELATION VECTOR ------------------
DATED QUARTERLY(1985:1 TO 1994:2)
(0)
0) #LR 1.000 1) #PPI 0.961
ORDINARY LEAST SQUARES ----------------------
QUARTERLY(1985:1 TO 1994:2) 38 OBSERVATIONS DEPENDENT VARIABLE: #LR
COEFFICIENT STD. ERROR T-STAT INDEPENDENT VARIABLE
-0.124894 0.06105 -2.046 CONSTANT
1) 1.17801 0.05668 20.78 #PPI
R-BAR SQUARED: 0.9209 DURBIN-WATSON STATISTIC: 0.3546 STANDARD ERROR OF THE REGRESSION: 0.02387 NORMALIZED: 0.02091
Levels, Light Rail Cost Index -- Total, (#LR) Solid Line, PPI Shaded Line
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