Mean and the variance
The random variable X has mean 9 and standard deviation 8. What is the mean and the variance of 2X,respectively?
Explain and show your work.
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Whicher Corporation had three products in its ending inventory at December 31, 2009. Whicher Corporation considers a profit margin of 15% of the sales price average for product 1 and a profit margin of 10%.
A certain capacitor stores 380 J of energy when it holds 7.2 10-2 C of charge. (a) What is the capacitance of this capacitor? µF (b) What is the potential difference across the plates?
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The Varone Company makes a single product called a Hom. The company has the capacity to produce 40,000 Homs per year. Per unit costs to produce and sell one Hom at that activity level.
The random variable X has mean 9 and standard deviation 8. What is the mean and the variance of 2X,respectively? Explain and show your work.
The real risk-free rate is 3.25%. Inflation is expected to be 1.5% this year and 4.75% during the next 2 years. Assume that the maturity risk premium is zero.
Let 18 and 10 be the standard deviations of the independent random variables X and Y, respectively. What is the standard deviation of the random variable U = X - Y. Explain and show work?
Ignoring the small amount of heat gained by the thermometer, find the specific heat capacity of the unknown material. Can someone actually help walk me through this instead of giving an answer with no explanation?
The constraint at Dalbey Corporation is time on a particular machine. The company makes three products that use this machine. Data concerning those products.
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