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Estadística y probabilidad - Preparación Educación Superior

Varianza y la desviación estándar de una muestra

Desviación estándar de la muestra

Un maestro pesó las mochilas de 4 estudiantes. Aquí están los pesos (en kilogramos):

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

La media es x, with, \bar, on top, equals, 8, start text, space, k, g, end text.

¿Cuál de estas fórmulas da la desviación estándar?

Escoge 1 respuesta:

s, start subscript, x, end subscript, equals, start fraction, 5, plus, 7, plus, 9, plus, 11, divided by, 4, end fraction
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
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
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
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

¿Atorado?