Os produtos da empresa Puzo apresentam distribuição normal com peso médio de 30 kg e desvio-padrão de 6 kg. Para testar a qualidade do seu produto,...

Para calcular a estatística de teste Z, utilizamos a fórmula Z = (X̄ - μ) / (σ/√n), onde X̄ é a média amostral, μ é a média populacional, σ é o desvio padrão populacional e n é o tamanho da amostra. Neste caso, temos: X̄ = 32 kg (média amostral) μ = 30 kg (média populacional) σ = 6 kg (desvio padrão populacional) n = 49 (tamanho da amostra) Substituindo na fórmula, temos: Z = (32 - 30) / (6/√49) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7) Z = 2 / (6/7