This stem-and-leaf plot represents test scores of students in a math class. if two test scores, 79 and 79, are added to the data, which statement will be true? a. the median will change; the mode will stay the same. b. the mode will change; the median will stay the same. c. the median and the mode will both change. d. the median and the mode will stay the same.

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?