Conteúdo principal

Estatística Avançada

Curso: Estatística Avançada > Unidade 3

Lição 3: Como medir a variabilidade em dados quantitativos

Desvio-padrão amostral

Google Sala de Aula

Um professor pesou as mochilas de 4 alunos. Estes são os pesos (em quilogramas):

5, comma, 7, comma, 9, comma, 11

A média é x, with, \bar, on top, equals, 8, start text, space, k, g, end text.

Qual das fórmulas a seguir dá o desvio-padrão?

(Escolha A)
s, start subscript, x, end subscript, equals, start fraction, 5, plus, 7, plus, 9, plus, 11, divided by, 4, end fraction
(Escolha B)
s, start subscript, x, end subscript, equals, start fraction, left parenthesis, 5, minus, 8, right parenthesis, plus, left parenthesis, 7, minus, 8, right parenthesis, plus, left parenthesis, 9, minus, 8, right parenthesis, plus, left parenthesis, 11, minus, 8, right parenthesis, divided by, 3, end fraction
(Escolha C)
s, start subscript, x, end subscript, equals, start fraction, left parenthesis, 5, minus, 8, right parenthesis, squared, plus, left parenthesis, 7, minus, 8, right parenthesis, squared, plus, left parenthesis, 9, minus, 8, right parenthesis, squared, plus, left parenthesis, 11, minus, 8, right parenthesis, squared, divided by, 3, end fraction
(Escolha D)
s, start subscript, x, end subscript, equals, square root of, start fraction, left parenthesis, 5, minus, 8, right parenthesis, plus, left parenthesis, 7, minus, 8, right parenthesis, plus, left parenthesis, 9, minus, 8, right parenthesis, plus, left parenthesis, 11, minus, 8, right parenthesis, divided by, 3, end fraction, end square root
(Escolha E)
s, start subscript, x, end subscript, equals, square root of, start fraction, left parenthesis, 5, minus, 8, right parenthesis, squared, plus, left parenthesis, 7, minus, 8, right parenthesis, squared, plus, left parenthesis, 9, minus, 8, right parenthesis, squared, plus, left parenthesis, 11, minus, 8, right parenthesis, squared, divided by, 3, end fraction, end square root

Enroscou?

Estatística Avançada

Curso: Estatística Avançada > Unidade 3

Problema