DESVIACION ESTANDAR Y VARIANZA

http://www.youtube.com/watch?v=JoB1VeXSvD8

MEDIA, MEDIANA, MODA

http://www.youtube.com/watch?v=xegBs_qswdw&feature=related

DESVIACION MEDIA

http://www.youtube.com/watch?v=zsRd2qidT4w&feature=related

EL RANGO

http://www.youtube.com/watch?v=33ROhHyhShQ&feature=related

MEDIDAS DE DISPERSIÓN

http://www.youtube.com/watch?v=aY_5y0eFXp0&feature=related