I am trying to compare Cuban players stats against other foreign players.
I am not an Statistician and never took a Statistics class in college. If any one has a background in Statistics, you are more than welcome to provide your input. For instance, how much a large number or small number may affect the results.
For all others Baseball-Fever users, you can also give your opinion about what you think about my findings.
If anyone have to rate the players from these countries with the current information I have provided, which country has done better. If the info provided is not enough, what other info is needed?
Mean: add up all the values in a set of data and then divide that sum by the number of values in the dataset.
Median: the value in the middle.
Standard deviation: the standard deviation is kind of the "mean of the mean," and often can help you find the story behind the data. To understand this concept, it can help to learn about what statisticians call normal distribution of data.
A normal distribution of data means that most of the examples in a set of data are close to the "average," while relatively few examples tend to one extreme or the other.
A large SD tells you that the data are fairly diverse, while a small SD tells you the data are pretty tightly bunched together. If you'll be doing a lot of work with numbers or scientific research, it will be worth your time to learn a bit about the standard deviation.
Since 1993 when the first Cuban baseball player, Rene Arocha, defected, these are the pitchers and their MLB stats for the following countries.
You may want to check my calculations because I may have made mistakes.
Cuban Pitchers
Player ERA
13 players
René Arocha 4.11
Ariel Prieto 4.85
Osvaldo Fernández 4.93
Liván Hernández 4.11
Rolando Arrojo 4.55
Orlando "Duque" Hernández 4.11
Vladimir Núñez 4.83
Michael Tejera 5.14
Adrián Hernández 6.55
Eddie Oropesa 7.34
Danys Báez 3.69
Hansel Izquierdo 4.55
José Contreras 4.28
Total 63.04
Ave ERA or Mean 4.85
Median 4.55
Standard Deviation 1.03
Japanese Pitchers
17 players
Hideo Nomo 4.21
Mac Suzuki 5.72
Hideki Irabu 5.15
Takashi Kashiwada 4.31
Shigetoshi Hasegawa 3.71
Masato Yoshii 4.62
Tomo Ohka 3.95
Masao Kida 5.83
Kazuhiro Sasaki 3.14
Satoru Komiyama 5.61
Takahito Nomura 8.56
Kazuhisa Ishii 4.44
Mike Nakamura 7.51
Shingo Takatsu 3.38
Kazuhito Tadano 4.47
Akinori Otsuka 2.57
Keiichi Yabu 4.5
Total 81.68
Ave ERA or Mean 4.8
Median 4.47
Standard Deviation 1.52
Venezuelan Pitchers
33 players
Omar Daal 4.55
Carlos Pulido 5.98
Juan Castillo 6.94
Felipe Lira 5.32
Dilson Torres 6.09
Ugueth Urbina 3.45
Edwin Hurtado 6.67
Giovanni Carrara 4.7
Alexander Pacheco 11.12
Edgar Ramos 5.14
Jeremi Gonzalez 4.84
Kelvin Escobar 4.38
Oscar Henriquez 6.06
Freddy Garcia 3.93
Beiker Graterol 15.75
Horacio Estrada 7.5
Orber Moreno 4.44
Carlos Hernandez 4.54
Antonio Armas Jr 4.32
Johan Santana 3.31
Ruben Quevedo 6.15
Darwin Cubillan 6.85
William Martinez 3
Victor Zambrano 4.38
Carlos Zambrano 3.26
Carlos Silva 3.84
Alex Herrera 5.11
Francisco Rodriguez 2.44
Wilfredo Ledezma 5.73
Rosman Garcia 5.94
Rafael Betancourt 3.08
Eduardo Villacis 13.5
Gustavo Chacin 3.65
Total 185.96
Ave ERA or Mean 5.64
Median 4.84
Standard Deviation 2.87
Dominican Pitchers
125 players - 3 players that have not stats = 112 players
Domingo Jean 4.46
Pedro Martínez 2.72
Julian Tavárez 4.33
Salomón Torres 4.48
Miguel Jiménez 5.9
Armando Benítez 2.92
Héctor Carrasco 3.94
José Lima 5.21
José Martínez 6.75
José Mercedes 4.75
Luis Andújar 5.98
Ramón Fermín 13.5
Wilson Heredia 3.41
Ramón Morel 4.98
José Parra 6.09
Carlos Pérez 4.44
Alberto Reyes 3.6
Félix Rodríguez 3.51
Carlos Valdez 5
Félix Heredia 4.42
José Paniagua 4.49
Rafael Quirico 37.8
Nerio Rodríguez 6.32
Amaury Telemaco 4.94
Dario Veras 4.67
Esteban Yan 5.12
Antonio Alfonseca 3.95
Carlos Almanzar 4.82
Manny Aybar 5.11
José Cabrera 4.95
Robinson Checo 7.61
Bartolo Colón 3.94
Nelson Cruz 5.04
Roberto Durán 6.58
Fernando Hernández 40.5
Julio Santana 5.26
Ramón Tatis 6.82
Valerio de los Santos 4.54
Lariel González 0
José Jimenez 4.92
Odalis Pérez 4.07
Rafael Roque 5.36
Jesús Sanchez 5.32
Marino Santana 7.94
Juan Peña 0.69
Guillermo Mota 3.61
Damaso Marte 3.2
Willis Roberts 4.64
Luis Vizcaíno 4.36
Hector Almonte 6.27
Francisco Cordero 3.26
Jesús Peña 5.21
Ramón Ortíz 4.72
Héctor Ramírez 5.4
Domingo Guzmán 19.5
Octavio Dotel 3.63
Geraldo Guzmán 5.04
Yovanny Lara 6.25
Lorenzo Barcelo 4.5
Pascual Coco 6.05
Leo Estrella 4.88
Leslie Brea 12.27
Daniel A. Mota 8.44
José Núñez 4.5
Víctor Santos 4.99
Wascar Serrano 6.56
José Acevedo 5.74
Jesús Colomé 4.7
Joaquin Benoit 5.17
Luis Pineda 4.44
Juan Carlos Cruz 4.36
Benito Báez 13.5
Miguel Asencio 5.14
Jorge Sosa 4.41
Rafael Soriano 3.24
Julio Mateo 3.56
Fernando Rodney 4.52
Duaner Sanchez 4.19
Runelvys Hernández 5
Reynaldo García 11.25
Luis de los Santos
Francis Beltrán 5.87
Ricardo Rodríguez 5.18
Franklyn Germán 4.75
Aquilino López 3.72
Claudio Vargas 4.96
José Valverde 2.71
Julio Mañon 4.13
Rodrigo Rosario 1.13
Edwin Almonte 11.12
Juan Domínguez 4.6
Félix Sánchez 10.8
Luis Martínez 9.92
Jorge de Paula 4
Fraklin Graceski
Félix Díaz 6.75
Daniel Cabrera 4.75
Franklin Francisco 3.33
Anastacio Martínez 8.44
Denny Bautista 7.03
Elizardo Ramírez 6.99
Eddy Rodríguez 4.78
Arnie Muñoz 10.05
Bartolomé Fortunato 3.81
Gregori Aquino 5.27
Roberto Novoa 4.8
Merkin Valdez 27
Yhency Brazoban 4.44
Jairo García 9.35
Jorge Vázquez
Franklin Núñez 7.47
Román Colón 5.09
Jerry Gil 0
Pedro Liriano 6.17
José Capellán 5.7
Francisco Cruceta 9.39
Total 711.15
Ave ERA or Mean 6.35
Median 4.97
Standard Deviation 5.5
Puerto Rican Pitchers
24 players
Angel Miranda 4.46
Bobby Munoz 5.17
Jose Alberro 7.41
Rafael Carmona 4.94
Michael James 3.67
Ricardo Jordan 5.25
Roberto Rivera 4.5
Frankie Rodriguez 5.53
Jose Rosado 4.27
Jose Santiago 4.36
Javier Martinez 4.83
Juan Romero 4.35
Javier Vazquez 4.28
Hector Mercado 4.55
Jose Rodriguez 9
Nelson Figueroa 4.65
Ismael Villegas 13.5
Joel Pineiro 4.11
Dicky Gonzalez 5.02
Pedro Feliciano 4.21
Javier Lopez 6.09
Kiko Calero 2.97
Juan Padilla 4.06
Fernando Cabrera 1.75
Total 122.93
Ave ERA or Mean 5.12
Median 4.6
Standard Deviation 2.25
Mexican Pitchers
26 players
Ismael Valdez 4.09
Juan Acevedo 4.33
Cesar Tavo Alvarez 5.4
Andres Berumen 5.66
Esteban Loiza 4.6
Isidro Marquez 6.75
Antonio Osuna 3.68
Francisco Cordova 3.96
Elmer Dessens 4.4
Jose Silva 5.41
Rigoberto Beltran 4.4
Dennis Reyes 4.8
Ricardo Rincon 3.53
Roberto Ramirez 7.69
Miguel del Toro 4.61
David Cortes 4.55
Luis Rivera 1.23
Daniel Garibay 6.03
Rodrigo Lopez 4.56
Oliver Perez 4.26
Victor Alvarez 7.31
Luis Ayala 2.75
Oscar Villareal 3.47
Edgar Gonzalez 8.58
Juan Cerros 4.85
Jorge de la Rosa 5.12
Total 126.02
Ave ERA or Mean 4.85
Median 4.58
Standard Deviation 1.5
I am not an Statistician and never took a Statistics class in college. If any one has a background in Statistics, you are more than welcome to provide your input. For instance, how much a large number or small number may affect the results.
For all others Baseball-Fever users, you can also give your opinion about what you think about my findings.
If anyone have to rate the players from these countries with the current information I have provided, which country has done better. If the info provided is not enough, what other info is needed?
Mean: add up all the values in a set of data and then divide that sum by the number of values in the dataset.
Median: the value in the middle.
Standard deviation: the standard deviation is kind of the "mean of the mean," and often can help you find the story behind the data. To understand this concept, it can help to learn about what statisticians call normal distribution of data.
A normal distribution of data means that most of the examples in a set of data are close to the "average," while relatively few examples tend to one extreme or the other.
A large SD tells you that the data are fairly diverse, while a small SD tells you the data are pretty tightly bunched together. If you'll be doing a lot of work with numbers or scientific research, it will be worth your time to learn a bit about the standard deviation.
Since 1993 when the first Cuban baseball player, Rene Arocha, defected, these are the pitchers and their MLB stats for the following countries.
You may want to check my calculations because I may have made mistakes.
Cuban Pitchers
Player ERA
13 players
René Arocha 4.11
Ariel Prieto 4.85
Osvaldo Fernández 4.93
Liván Hernández 4.11
Rolando Arrojo 4.55
Orlando "Duque" Hernández 4.11
Vladimir Núñez 4.83
Michael Tejera 5.14
Adrián Hernández 6.55
Eddie Oropesa 7.34
Danys Báez 3.69
Hansel Izquierdo 4.55
José Contreras 4.28
Total 63.04
Ave ERA or Mean 4.85
Median 4.55
Standard Deviation 1.03
Japanese Pitchers
17 players
Hideo Nomo 4.21
Mac Suzuki 5.72
Hideki Irabu 5.15
Takashi Kashiwada 4.31
Shigetoshi Hasegawa 3.71
Masato Yoshii 4.62
Tomo Ohka 3.95
Masao Kida 5.83
Kazuhiro Sasaki 3.14
Satoru Komiyama 5.61
Takahito Nomura 8.56
Kazuhisa Ishii 4.44
Mike Nakamura 7.51
Shingo Takatsu 3.38
Kazuhito Tadano 4.47
Akinori Otsuka 2.57
Keiichi Yabu 4.5
Total 81.68
Ave ERA or Mean 4.8
Median 4.47
Standard Deviation 1.52
Venezuelan Pitchers
33 players
Omar Daal 4.55
Carlos Pulido 5.98
Juan Castillo 6.94
Felipe Lira 5.32
Dilson Torres 6.09
Ugueth Urbina 3.45
Edwin Hurtado 6.67
Giovanni Carrara 4.7
Alexander Pacheco 11.12
Edgar Ramos 5.14
Jeremi Gonzalez 4.84
Kelvin Escobar 4.38
Oscar Henriquez 6.06
Freddy Garcia 3.93
Beiker Graterol 15.75
Horacio Estrada 7.5
Orber Moreno 4.44
Carlos Hernandez 4.54
Antonio Armas Jr 4.32
Johan Santana 3.31
Ruben Quevedo 6.15
Darwin Cubillan 6.85
William Martinez 3
Victor Zambrano 4.38
Carlos Zambrano 3.26
Carlos Silva 3.84
Alex Herrera 5.11
Francisco Rodriguez 2.44
Wilfredo Ledezma 5.73
Rosman Garcia 5.94
Rafael Betancourt 3.08
Eduardo Villacis 13.5
Gustavo Chacin 3.65
Total 185.96
Ave ERA or Mean 5.64
Median 4.84
Standard Deviation 2.87
Dominican Pitchers
125 players - 3 players that have not stats = 112 players
Domingo Jean 4.46
Pedro Martínez 2.72
Julian Tavárez 4.33
Salomón Torres 4.48
Miguel Jiménez 5.9
Armando Benítez 2.92
Héctor Carrasco 3.94
José Lima 5.21
José Martínez 6.75
José Mercedes 4.75
Luis Andújar 5.98
Ramón Fermín 13.5
Wilson Heredia 3.41
Ramón Morel 4.98
José Parra 6.09
Carlos Pérez 4.44
Alberto Reyes 3.6
Félix Rodríguez 3.51
Carlos Valdez 5
Félix Heredia 4.42
José Paniagua 4.49
Rafael Quirico 37.8
Nerio Rodríguez 6.32
Amaury Telemaco 4.94
Dario Veras 4.67
Esteban Yan 5.12
Antonio Alfonseca 3.95
Carlos Almanzar 4.82
Manny Aybar 5.11
José Cabrera 4.95
Robinson Checo 7.61
Bartolo Colón 3.94
Nelson Cruz 5.04
Roberto Durán 6.58
Fernando Hernández 40.5
Julio Santana 5.26
Ramón Tatis 6.82
Valerio de los Santos 4.54
Lariel González 0
José Jimenez 4.92
Odalis Pérez 4.07
Rafael Roque 5.36
Jesús Sanchez 5.32
Marino Santana 7.94
Juan Peña 0.69
Guillermo Mota 3.61
Damaso Marte 3.2
Willis Roberts 4.64
Luis Vizcaíno 4.36
Hector Almonte 6.27
Francisco Cordero 3.26
Jesús Peña 5.21
Ramón Ortíz 4.72
Héctor Ramírez 5.4
Domingo Guzmán 19.5
Octavio Dotel 3.63
Geraldo Guzmán 5.04
Yovanny Lara 6.25
Lorenzo Barcelo 4.5
Pascual Coco 6.05
Leo Estrella 4.88
Leslie Brea 12.27
Daniel A. Mota 8.44
José Núñez 4.5
Víctor Santos 4.99
Wascar Serrano 6.56
José Acevedo 5.74
Jesús Colomé 4.7
Joaquin Benoit 5.17
Luis Pineda 4.44
Juan Carlos Cruz 4.36
Benito Báez 13.5
Miguel Asencio 5.14
Jorge Sosa 4.41
Rafael Soriano 3.24
Julio Mateo 3.56
Fernando Rodney 4.52
Duaner Sanchez 4.19
Runelvys Hernández 5
Reynaldo García 11.25
Luis de los Santos
Francis Beltrán 5.87
Ricardo Rodríguez 5.18
Franklyn Germán 4.75
Aquilino López 3.72
Claudio Vargas 4.96
José Valverde 2.71
Julio Mañon 4.13
Rodrigo Rosario 1.13
Edwin Almonte 11.12
Juan Domínguez 4.6
Félix Sánchez 10.8
Luis Martínez 9.92
Jorge de Paula 4
Fraklin Graceski
Félix Díaz 6.75
Daniel Cabrera 4.75
Franklin Francisco 3.33
Anastacio Martínez 8.44
Denny Bautista 7.03
Elizardo Ramírez 6.99
Eddy Rodríguez 4.78
Arnie Muñoz 10.05
Bartolomé Fortunato 3.81
Gregori Aquino 5.27
Roberto Novoa 4.8
Merkin Valdez 27
Yhency Brazoban 4.44
Jairo García 9.35
Jorge Vázquez
Franklin Núñez 7.47
Román Colón 5.09
Jerry Gil 0
Pedro Liriano 6.17
José Capellán 5.7
Francisco Cruceta 9.39
Total 711.15
Ave ERA or Mean 6.35
Median 4.97
Standard Deviation 5.5
Puerto Rican Pitchers
24 players
Angel Miranda 4.46
Bobby Munoz 5.17
Jose Alberro 7.41
Rafael Carmona 4.94
Michael James 3.67
Ricardo Jordan 5.25
Roberto Rivera 4.5
Frankie Rodriguez 5.53
Jose Rosado 4.27
Jose Santiago 4.36
Javier Martinez 4.83
Juan Romero 4.35
Javier Vazquez 4.28
Hector Mercado 4.55
Jose Rodriguez 9
Nelson Figueroa 4.65
Ismael Villegas 13.5
Joel Pineiro 4.11
Dicky Gonzalez 5.02
Pedro Feliciano 4.21
Javier Lopez 6.09
Kiko Calero 2.97
Juan Padilla 4.06
Fernando Cabrera 1.75
Total 122.93
Ave ERA or Mean 5.12
Median 4.6
Standard Deviation 2.25
Mexican Pitchers
26 players
Ismael Valdez 4.09
Juan Acevedo 4.33
Cesar Tavo Alvarez 5.4
Andres Berumen 5.66
Esteban Loiza 4.6
Isidro Marquez 6.75
Antonio Osuna 3.68
Francisco Cordova 3.96
Elmer Dessens 4.4
Jose Silva 5.41
Rigoberto Beltran 4.4
Dennis Reyes 4.8
Ricardo Rincon 3.53
Roberto Ramirez 7.69
Miguel del Toro 4.61
David Cortes 4.55
Luis Rivera 1.23
Daniel Garibay 6.03
Rodrigo Lopez 4.56
Oliver Perez 4.26
Victor Alvarez 7.31
Luis Ayala 2.75
Oscar Villareal 3.47
Edgar Gonzalez 8.58
Juan Cerros 4.85
Jorge de la Rosa 5.12
Total 126.02
Ave ERA or Mean 4.85
Median 4.58
Standard Deviation 1.5
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