A distribuição de salários de uma empresa com 30 funcionários é dada na tabela seguinte.

                  Salário (em salários mínimos)       Funcionários
                                    1,8                                           10
                                    2,5                                             8
                                    3,0                                             5
                                    5,0                                             4
                                    8,0                                             2
                                  15,0                                             1

Pode-se concluir que