Apallet requires 2 minutes and 15 seconds to prepare for shipment, and 30 seconds to load on a trailer. how long will it take to prepare 40 pallets and load them onto a trailer

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?