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Table 7 Ordinary least squares (OLS) regression results

From: Units of information on dynamic message signs: a speed pattern analysis

 

Coefficient

Std. Error

t-ratio

p-value

All units

 const

37.6030

1.75017

21.49

< 0.0001*

 Male

0.852680

0.633566

1.346

0.1786

 26 to 35

4.12656

0.850250

4.853

< 0.0001*

 36 to 45

−0.178345

1.02615

−0.1738

0.8620

 46 to 55

0.881788

0.975464

0.9040

0.3662

  > 55 age

−1.03709

1.37046

−0.7567

0.4493

6–7 units

 const

35.5793

4.11774

8.640

< 0.0001*

 Male

2.09607

1.24063

1.690

0.0924

 26 to 35

0.205542

1.60506

0.1281

0.8982

 36 to 45

−3.16696

1.83939

−1.722

0.0864

 46 to 55

0.635486

1.66670

0.3813

0.7033

  > 55 age

−5.54713

2.10955

−2.630

0.0091*

5 units

 const

42.0496

2.19147

19.19

< 0.0001*

 Male

−1.25050

0.782958

− 1.597

0.1119

 26 to 35

0.313431

0.875176

0.3581

0.7206

 36 to 45

−0.0151478

1.15074

−0.01316

0.9895

 46 to 55

0.831526

0.966787

0.8601

0.3908

  > 55 age

1.98762

1.42122

1.399

0.1636

4 units

 const

37.3436

1.25707

29.71

< 0.0001*

 Male

−1.05145

0.494319

−2.127

0.0341*

 26 to 35

2.36136

0.707826

3.336

0.0009*

 36 to 45

−2.85666

0.836796

−3.414

0.0007*

 46 to 55

−0.665750

0.864182

−0.7704

0.4416

  > 55 age

−0.953455

1.13846

−0.8375

0.4029

2–3 units

 const

38.3359

3.65360

10.49

< 0.0001*

 Male

1.60923

1.30303

1.235

0.2173

 26 to 35

7.05271

1.82269

3.869

0.0001*

 36 to 45

0.796663

2.17824

0.3657

0.7147

 46 to 55

2.05524

2.09469

0.9812

0.3269

  > 55 age

−0.764986

3.23152

−0.2367

0.8129

  1. *Statistically significant as P < 0.05 at 95% Confidence Interval