Estadistica descriptiva

1- Mentefacto Medidas de Dispersión

2.- Con el fin de decidir cuantas cajas para atención a los clientes se necesitaran en las tiendas que construirán en el futuro, una cadena de supermercados quiso obtener información acerca del tiempo (minutos) requerido para atender los clientes. Se recogieron los siguientes datos correspondientes al tiempo de atención a:

|3.6 |1.9|2.1 |0.3 |0.8 |
|0.3 |8 |2.4 |0.09 |0.72 |
|0.4 |1 |0.4 |0.16 |0.16 |
|0.5|2 |1 |0.25 |0.5 |
|0.6 |2 |1.2 |0.36 |0.72 |
|0.7 |2 |1.4 |0.49 |0.98 |
|0.8|4 |3.2 |0.64 |2.56 |
|0.9 |2 |1.8 |0.81 |1.62 |
|1 |2 |2 |1 |2|
|1.1 |4 |4.4 |1.21 |4.84 |
|1.2 |2 |2.4 |1.44 |2.88 |
|1.3 |2 |2.6 |1.69 |3.38|
|1.4 |4 |5.6 |1.96 |7.84 |
|1.6 |2 |3.2 |2.56 |5.12 |
|1.7 |2 |3.4 |2.89|5.78 |
|1.8 |8 |14.4 |3.24 |25.92 |
|1.9 |2 |3.8 |3.61 |7.22 |
|2.1 |2 |4.2 |4.41|8.82 |
|2.3 |1 |2.3 |5.29 |5.29 |
|2.5 |2 |5 |6.25 |12.5 |
|2.8 |2 |5.6|7.84 |15.68 |
|3 |3 |9 |9 |27 |
|3.1 |2 |6.2 |9.61 |19.22 |
|3.2 |1 |3.2|10.24 |10.24 |
|3.6 |2 |7.2 |12.96 |25.92 |
|4.5 |1 |4.5 |20.25 |20.25 |

n = 65 ∑ X*F = 100.4 ∑ X2 = 108.25 ∑...