A teacher recorded the resting heart rate (in beats per minute) for every student in four classes. Boys data is shown in the left matrix and girls data in the right matrix. What percent of all the girls had a heart rate over 80 beats per minute? A) 11% B) 17% C) 23% D) 33%

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?