Calculate the sample mean-sample variance
The diameter of six automotive piston rings is shown below. Calculate the sample mean, sample variance, and sample standard deviation.
74.003 mm 73.996 mm
74.007 mm 74.003 mm
74.004 mm 74.006 mm
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Why do chemists prefer to read and record the absorbance, rather than the percent transmittance, of light (electromagnetic radiation) when analyzing a sample having a visible color?
A freshwater jet boat takes in water through side vents and ejects it through a nozzle of diameter D=75 mm. What speed V will be produced if the jet speed is increased to Vj= 25 m/s?
Chlorine dioxide, ClO2, has been used as a disinfectant in air conditioning systems. It reacts with water according to the equation
The life of a tube (X1) and the filament diameter (X2) are distributed as a bivariate normal random variable with the parameters µ1 = 1800 hours, µ2 = 0.05 inch, (sigma^2) 1 = 1600 hours2, (sigma^2)2 = 0.04 inch2
An immediate lump sum payment of $1 500 000 is being considered as an alternative to this royalty scheme. What alternative is preferred if the company's cost of capital is in fact lower than this break-even rate?
Find the fraction y of the steam extracted to the open feedwater heater. Find the cycle thermal efficiency and the power output in MW of if the steam mass flow rate is 5x10^6lbm per hour.
Calculate the thermal efficiency and the net power developed, in horsepower, if the turbine and the compressor isentropic efficiencies are each 100%.
What value(s) of the initial angle (theta) will cause the ball to pass through the center of the rim? Neglect clearance considerations as the ball passes over the from portion of the rim.
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