OPERACIONES CON FRACCIONES MEC
Tarea 1- EJERCICIOS DE A. I.:
De las siguientes Operaciones con lo Fracciones, realiza el
cálculo con procedimiento y pon la respuesta correcta al
terminar en un rectángulo:
i) 3/5 - (-1/4) = - 17/20
ii) -7/6 + 8/9 = -5/18
iii) (3/8) (2/3) = - 1/4

iv)
(3/2 =4/3) = - 9/8
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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?