Dado una población N(321, 54), para una muestra aleatoria de tamaño n = 28, Ejercicio 0.5. La distribución de la media muestral X¯, es: (a) Una normal con media 321 y varianza 54 (b) Una normal con media 321 y varianza 1.3887 (c) Una normal con media 321 y varianza 1.9286 (d) Una normal con media 321 y varianza 1 Ejercicio 0.6. Hallar la probabilidad que la media muestral barX asuma valores en el intervalo [289, 3573]. (a) 0.9633 (b) 1.0000 (c) 0.6912 (d) 0.9543 Ejercicio 0.7. La probabilidad que la media muestral barX difiera de la media poblacional µ en más de 5.67 es: (a) 0.9016 (b) 0.8961 (c) 0.9942 (d) 0.9966

The federal reserve controls certain interest rates in the united states. investors often try to speculate as to whether the federal reserve will raise or lower rates and by how much. suppose a company conducts extensive interviews with financial analysts, and as a result, predicts that "thefed" will increase rates by an average of 0.25 percentage points every six months for the forseeable future. which type of equation could be used to model the predicted interest rates over the next several years, assuming no other significant changes? a) a linear equation b) a quadratic equation c) a polynomial equation d) an exponential equation