Standard deviation of the random variable
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?
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Let U be a uniform (0, 1) random variable. Suppose that n trials are to be performed and that conditional on U = u these trials will be independent with a common success probability u. Compute the mean and variance of the number of successes that
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.
The mean number of animals in a forest of a certain variety is 40, and the standard deviation is 4. A random sample of 80 animals is taken. What is the approximate distribution of the total number of animals in the sample? Show work.
A normal shock wave exists in Mach 2 stream of air having temperature and pressure of 45°F and 30 psia, respectively. Calculate the Mach number, pressure, and temperature downstream of the shock wave.
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