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t-tests for Treatment and Control Schools (cont’d)







Treatment

Control

Means

t-test

Variable label

Variable description

N

Mean

S.D.

N

Mean

S.D.




alum2004

number of students at cycle 2004

124

81.5484

82.1292

124

82.5726

71.3643

0.1048

alum2005

number of students at cycle 2005

125

79.6000

79.8188

125

82.0560

70.7717

0.2574

alum2006

number of students at cycle 2006

125

79.2400

76.5979

125

81.8560

71.7585

0.2787

crowding2004

ratio students to classrooms available cycle 2004

124

21.7129

8.7238

124

21.5143

8.5206

-0.1813

crowding2005

ratio students to classrooms available cycle 2005

125

20.7147

8.3145

125

21.0641

7.7720

0.3432

crowding2006

ratio students to classrooms available cycle 2006

125

21.1298

10.3562

125

21.1355

9.1721

0.0046

directores2004

number of principals with/without group cycle 2004

124

0.9839

0.1265

124

1.0161

0.1265

2.0082*

directores2005

number of principals with/without group cycle 2005

125

1.0000

0.1796

125

1.0000

0.1270

0.0000

directores2006

number of principals with/without group cycle 2006

125

0.9920

0.0894

125

1.0000

0.1270

0.5758

puntajeen2006

enlace score 2006

125

442.0514

62.3534

125

440.8423

53.7559

-0.1642

desercionen2006

dropout rate cycle 2006

125

5.1392

6.7390

125

3.8624

5.8671

-1.5976

reprobacioen2006

failure rate cycle 2006

125

9.9424

7.4835

125

8.7672

6.5273

-1.3232

REDES 2006

Rural teacher incentive

125

0.008

0.008

125

0.024

0.1536

1.0061

Enciclomedia 2006

Classroom technology

125

0.008

0.008

125

0.024

0.1536

1.0061

Capage 2006

Training to parents

125

0.896

0.027

125

0.904

0.0264

0.21

Infraestructura 2005

Infrastructure

125

0

0

125

0.016

0.0112

1.42

Infraestructura 2006

Infrastructure

125

0.008

0.008

125

0.016

0.0112

0.5789

Material (2005)

School supplies

124

0

0

123

0

0




Material (2006)

School supplies

124

0.3064

0.041

124

0.28225

0.4519

-0.4164

Capacitación (2005)

Teacher training

125

0.304

0.461

125

0.248

0.4335

-0.9884

Capacitación (2006)

Teacher training

125

0.16

0.368

125

0.248

0.4335

1.7299

Oportunidades (2005)

CCT

124

37.4032

36.284

123

40.67

33.69

0.7341

Oportunidades (2006)

CCT

124

37.4032

36.284

124

40.95

33.7

0.7979

Ratio 2005

Ratio CCT

124

0.4996

0.138

123

0.521589

0.1285

1.2866

Ratio 2006

Ratio CCT

124

0.4954

0.140

124

0.52544

0.1282

1.7581

Ratio CM 2004

Ratio teacher incentive

124

0.1877

0.292

124

0.196303

0.3244

0.2183

Ratio CM 2005

Ratio teacher incentive

125

0.1971

0.308

125

0.18831

0.3024

-0.2281

Ratio CM 2006

Ratio teacher incentive

125

0.1832

0.299

125

0.179008

0.2952

-0.112

1er Material 2005

1st grade students with supplies

124

14.298

14.171

123

13.90244

12.1967

-0.2353

2º Material 2005

2nd grade students with supplies

124

14.145

13.820

123

13.78862

11.9454

-0.2168

3er Material 2005

3rd grade students with supplies

124

14.25

13.853

123

14.39024

13.3346

0.081

4to Material 2005

4th grade students with supplies

124

13.9758

13.250

123

14.80488

11.6792

0.5215

5to Material 2005

5th grade students with supplies

124

13.4032

14.924

123

14.07317

12.3309

0.3844

6to Material 2005

6rh grade students with supplies

124

11.7258

12.808

123

12.76423

11.2520

0.6767

1er Material 2006

1st grade students with supplies

124

14.3225

14.492

124

14.14516

12.8485

-0.102

2º Material 2006

2nd grade students with supplies

124

14.1612

13.830

124

14.03226

12.8897

-0.076

3er Material 2006

3rd grade students with supplies

124

13.9838

13.957

124

13.31452

11.5338

-0.4117

4to Material 2006

4th grade students with supplies

124

13.5161

13.081

124

14.08871

12.6709

0.3501

5to Material 2006

5th grade students with supplies

124

12.9193

12.641

124

13.6129

11.1528

0.4581

6to Material 2006

6rh grade students with supplies

124

12.3467

12.882

124

13.39516

11.9910

0.6633

1ro Capacitación 05

1st grade teachers with training

124

0.30645

0.462

123

0.252033

0.4359

-0.951

1ro Capacitación 06

1st grade teachers with training

124

0.21774

0.618

124

0.282258

0.6056

0.8296

2do Capacitación 06

2nd grade teachers with training

124

0.20967

0.588

124

0.306452

0.6647

1.2141

3ro Capacitación 06

3rd grade teachers with training

124

0.19354

0.579

124

0.274194

0.5890

1.0865

4to Capacitación 06

4th grade teachers with training

124

0.18548

0.499

124

0.322581

0.6692

1.8276

5to Capacitación 06

5th grade teachers with training

124

0.19354

0.551

124

0.258065

0.5390

0.9319

6to Capacitación 06

6th grade teachers with training

124

0.19354

0.536

124

0.298387

0.6373

1.4018

Attachment Table 4.1: Mean t-tests for Treatment and Control Schools (cont’d)







Treatment

Control

Means

t-test

Variable label

Variable description

N

Mean

S.D.

N

Mean

S.D.




Intensidad 2006

Program intensity

125

2.376

0.819

125

2.488

0.0767

1.0804

Intensidad 2005

Program intensity

125

1.296

0.458

125

1.256

0.4735

-0.6786

Note: * Significant at 95%




1 A potential source of contamination for control schools may come from the fact that some spillover effects may be induced from the treatment school for parental efforts. However, in the randomized sample we only have one locality with two treatment schools, another with two control schools, and a third locality with a treatment and control school together. Thus, we do not deem this a problem.


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