There are 25 students in Mrs. Venetozzi's class at the beginning of the school year, and the average number of siblings for each student is 3.A
new student with 8 siblings joins the class in November. What is the new class average for number of siblings? Round your answer to the
nearest hundredth.

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?