New line of ink-jet printers
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.
Expected delivery within 24 Hours
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.
Let X be an exponentially distributed random variable such that P( X > 3) = 0.4. Find E(X).
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?
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
A sample of size 21 is taken and a significance test for H0 : u = 0 versus Ha : u doesnt equal 0 is run. The test statistic is t = 1.71. Use 3 decimal places for t values and 2 decimal places for p-values. What are the degrees of freedom for this
Determine the rotor diameter and the nozzle angle if the vane width is 12.7 mm, clearly indicating the assumptions made. For the gas assume, Cp= 1.13 kJ/kgC and sp. Heat ratio = 1.33.
Let x-bar1 = 117, x-bar2 = 90, s1 = 10.8, s2 = 11.4, n1 = 50, n2 = 50. Find a 95% confidence interval for the difference in the values of μ. For the following, use 3 decimal places.
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