Shayla wants to refinish the floors in her kitchen. Shayla predicts she will be able to cover the room with 75 square feet of tile flooring. Will Shayla be able to cover the floor with 75 square feet of tile flooring? a. Yes, the area of the floor space in the room is less than 54 square feet. b. Yes, the area of the floor space is more than 70 square feet. c. No, Shayla will need 10 more square feet to cover the floor. d. No, Shayla will need at least 21 more square feet.

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?