The grades on a language midterm at Loyola are roughly symmetric with u = 69 and o = 4.0. Vanessa scored 65 on the exam.

Find the z-score for Vanessa's exam grade. Round to two decimal places.

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?