Ms. Romo had $80 to purchase food for her students. She bought 32 bags of french fries and 35 hamburgers. Each hamburger cost $1.40, and each bag of french fires cost $0.56. How much money did Ms. Romo have left after these purchases?

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An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required