Formula for a variance
In the formula for a variance, what is the sum if we dont square the (x-u) values? Hint: there is a special name for this sum.
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A supertanker with the mass of 8.92 × 109 kg is moving with a constant velocity. Its engines generate a forward thrust of 2.05 × 105 N. Determine (a) the magnitude of the resistive force exerted on the tanker by the water and (b) the mag
An adiabatic steam turbine operates at steady state with inlet conditions P1=500 kPa, T1=360 C, steam leaves the turbine at a pressure P2=100 kPa. The KE and PE change between inlet and outlet are negligible.
Conduct the hypothesis test and provide the test statistic, critical value, and or p value and state the conclusion.
An engine operates on the air standard diesel cycle with inlet air conditions of 77 F and 14.5 psia. The compression ratio is 16, and the heat added is 700 Btu/lbm. Determine the max temp and pressure and the thermal efficiency for the engine.
An airplane is flying in a horizontal circle at a speed of 122 m/s. The 80.0 kg pilot does not want his centripetal acceleration to exceed 6.00 times free-fall acceleration.
Use a 0.05 significance level test the claim taht the three cateogries of blood lead level have hte same mean full IQ score. Does it appear that the exposure to lead has an effect on full IQ scores?
Determine the mass of methane gas stored in a 2 m3 tank at ?30°C, 3 MPa. Estimate the percent error in the mass determination if the ideal gas model is used.
A 1.60*10^3 kg car rounds a circular turn of radius 22.0 m. If the road is flat and the coefficient of static friction between the tires and the road is 0.7, how fast can the car go without skidding?
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