As notas, em Estatística, de 20 alunos de uma turma do IFSul são as seguintes:
7,0 5,0 9,0 5,0 8,0 4,0 8,0 9,0 10,0 8,0
6,0 6,0 6,0 10,0 8,0 9,0 5,0 5,0 6,0 6,0

a) Organize os dados em uma tabela de distribuição de frequência absoluta e relativa.
b) Determine a média, a mediana, a moda, o desvio padrão e o coeficiente de variação.