Distribución de frecuencias

https://docs.google.com/viewer?a=v&pid=gmail&attid=0.2&thid=1410a6a8c525afe9&mt=application/vnd.openxmlformats-officedocument.spreadsheetml.sheet&url=https://mail.google.com/mail/?ui%3D2%26ik%3Df5cdbc5cc7%26view%3Datt%26th%3D1410a6a8c525afe9%26attid%3D0.2%26disp%3Dsafe%26realattid%3Df_hlft6z4l1%26zw&sig=AHIEtbQOuThph8n-NZj84MJTnk9ILlQSWg