Math Problem Statement
2 - O departamento pessoal de uma certa firma fez um levantamento dos sal ́arios dos 120 funcion ́arios do setor administrativo, obtendo os resultados (em sal ́arios m ́ınimos) da tabela abaixo. Faixa Salarial Frequˆencia Relativa 0 ⊢ 2 0, 25 2 ⊢ 4 0, 40 4 ⊢ 6 0, 20 6 ⊢ 10 0, 15 (a) Esboce o histograma correspondente. (b) Calcule a m ́edia, o segundo e o terceiro quartil. (c) Se for concedido um aumento de 100% para todos os 120 funcion ́arios, haver ́a altera ̧c ̃ao na m ́edia e na variˆancia? Justifique sua resposta. (d) Se for concedido um abono de dois sal ́arios m ́ınimos para todos os 120 funcion ́arios, haver ́a altera ̧c ̃ao na m ́edia e na variˆancia? Justifique sua resposta.
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Math Problem Analysis
Mathematical Concepts
Statistics
Histogram
Measures of Central Tendency
Measures of Dispersion
Formulas
Mean calculation formula
Quartile calculation using cumulative frequencies
Variance formula
Theorems
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Suitable Grade Level
College Level
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