A sandwich shop claims to sell sub sandwiches that are 12 is long. An employee is a little suspicious about this claim so over the course of the next week he measures 45 sandwiches at random. The mean and standard deviation for the 45 sandwiches is 11.85 and .65 inches. What is the sample in this problem?

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?