Respuestas

2014-01-22T07:54:51+01:00
Media aritmetica

( 15 + 28 + 21+ 17+18+11+15+14+11+22+25+9+12+18+15+14+14+20 )/19 = 315÷19

=16.5789473684

La moda se repiten 14 y 15
14 + 15/2 = 14.5

la mediana

9+ 11+12+ 14+15+16+17+18+20+21+22+25+28 = 17
16 4 16