Mathematics, 25.03.2020 20:45 kebo63
Five automobiles of the same type are to be driven on a 300-mile trip. The first two will use an economy brand of gasoline, and the other three will use a premium brand. Let X1, X2, X3, X4 and X5 be random variables representing the fuel efficiencies (mpg) for the five cars. Suppose these variables are independent and normally distributed with mu1 = mu2 = 20, mu3 = mu4 = mu5 = 21, and sigma 2 = 4 for the economy brand and 3.5 for premium brand. Define a random variable Y by Y = X1 + X2 /2 - X3 + X4 + X5 / 3, so that Y is a measure of the difference in efficiency between economy gas and premium gas. Compute P(0 le Y) and P(-1 le Y le 1). [Hint: write Y = c1X1 + ... +c5X5.]
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Pleasseee important quick note: enter your answer and show all the steps that you use to solve this problem in the space provided. use the circle graph shown below to answer the question. a pie chart labeled favorite sports to watch is divided into three portions. football represents 42 percent, baseball represents 33 percent, and soccer represents 25 percent. if 210 people said football was their favorite sport to watch, how many people were surveyed?
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Five automobiles of the same type are to be driven on a 300-mile trip. The first two will use an eco...
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