Tenemos una bolsa con 6 bolas rojas, 3 bolas azules, tenemos dos. No hay reemplazo. ¿Cuál es la probabilidad de que ambos sean azules? ¿Cuál es la probabilidad de que todos ellos tengan el mismo color? ¿Cuál es la probabilidad de que tengan diferentes colores?

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?