(04.06 MC) The 200-meter race times at a state track meet a…
(04.06 MC) The 200-meter race times at a state track meet are normally distributed with a mean of 13.56 seconds and a standard deviation of 2.24 seconds. Using the Standard Normal Probabilities table, what is the approximate probability that a runner chosen at random will have a 200-meter time less than 13.5 seconds? (5 points)
Read DetailsA twelve-month old boy was in for his one-year health superv…
A twelve-month old boy was in for his one-year health supervision visit 3 days ago, and he received the MMR and HepB and Hib vaccines at that time. His mother chose not to give the Varivax (chickenpox) vaccine because she wanted him to get the “real thing.” She has since changed her mind and wants to come back for the vaccine as soon as possible. The appropriate timing to give this vaccine is:
Read DetailsA beam has dimensions of b = 14 in., h = 28 in., d’ = 2.5 in…
A beam has dimensions of b = 14 in., h = 28 in., d’ = 2.5 in., and d = 25.5 in. It is reinforced with 2 No. 5 bars on the compression side and 5 No. 8 bars on the tension side. The concrete strength is 2,800 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 7.179 in., determine the force in the compression reinforcement, Cs.
Read Details(04.02 MC) To increase sales, an online clothing store bega…
(04.02 MC) To increase sales, an online clothing store began giving a 50% off coupon to random customers. Customers didn’t know whether they would receive the coupon until after the final sale. The website claimed that one in five customers received the coupon. Six customers each made purchases from the website. Let X = the number of customers that received the 50% off coupon.Part A: Is X a binomial random variable? Explain. (3 points)Part B: What is the mean and standard deviation of X? Provide an interpretation for each value in context. (4 points)Part C: Two of the six customers receive the coupon with their purchase. Is the store’s claim accurate? Compute P(X ≥ 2) and use the result to justify your answer. (3 points) (10 points)
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