A group of 7 students was asked, "How many hours did you watch television last week?" Here are their responses. 6,7,9, 7, 13, 6, 11 Find the mean number of hours for these students. If necessary, round your answer to the nearest tenth.

What is the first quartile of this data set? 10, 11, 12, 15, 17, 19, 22, 24, 29, 33, 38 a. 12 b. 19 c. 29 d. 10

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

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?