Distributed random variable
Let X be an exponentially distributed random variable such that P( X > 3) = 0.4. Find E(X).
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If the cooling water enters at 85F and leaves at 104F what is the mass flow rate of the cooling water. Assume the water is a compressed liquid at 30 psia.
Consider a multiple regression model, y = beta_0 + beta_1 * x_1 + beta_2 * x_2 + beta_3 * x_3 to fit these data, which consist of points of the form (x_1, x_2, x_3, y):
Suppose the doctor would be content with 95% condifence. how does that decrease in confidence affect the sample size required?
Determine for this machine the slip factor, isentropic efficiency and the Mach number at the diffuser inlet, stating your assumptions. For air Cp=1.0 kJ/kg.K and sp. Heat ratio = 1.4.
Give the appropriate t quantile value, tdf, 1 - a/2, that would be used to construct a confidence interval for the mean of the population in each of the following situations.
A 8.0-g string, 0.87 m long, is under tension. The string produces a 900-Hz tone when it vibrates in the third harmonic. The speed of sound in air is 344 m/s. What is the wavelength of the tone in air, in SI units?
The manufacturer of a new line of ink-jet printers would like to include as part of its advertising the number of pages a user can expect from a print cartridge. A sample of 10 cartridges revealed the following number of pages printed.
At some instant the velocity components of an electron moving between two charged parallel plates are vx = 1.10 105 m/s and vy = 2.00 103 m/s. Suppose that the electric field between the plates is given by Evec = (115 N/C) jhat. (a) What is the el
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