Mean and standard deviation
Given independent random variables with the means and standard deviations below, find the mean and standard deviation of the following random variable: X+2Y
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The American Veterinary Association claims that the annual cost of medical care for dogs averages $100 with a standard deviation of $30. For cats it averages $120 with a standard deviation of $35. What is the expected difference in the cost of med
Finally, sketch a fourth wave of amplitude 2 cm in phase with the first two waves. Use the sketches to aid answering the following questions.(a) What is the amplitude of the sum of these waves?
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