Confidence interval for the true mean length of the bolt
In a manufacturing process a random sample of 36 bolts manufactured has a mean length of 1.71 inches with a standard deviation of .08 inches. What is the 90% confidence interval for the true mean length of the bolt?
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Calculate the allowable internal design pressure at 72% design factor for an 18 in. pipeline, wall thickness 0.375 in. and pipe material API 5LX-46. What is the hydrotest pressure range for this pipeline?
he drive sprocket has 19 teeth and the sprocket on the mixer has 84 teeth. Determine the speed of the drive sprocket, the chain speed, and the recommended lubrication method.
You work for an auto company. Each car produced is expected to have no more than4 defects (fit and finish tolerances outside of parameters).
Using constant specific heats evaluated at 300 K, determine the total entropy production (kJ/K) after an hour assuming thermal equilibrium is achieved.
Metallica Bearings, Inc., is a young start-up company. No dividends will be paid on the stock over the next nine years, because the firm needs to plow back its earnings to fuel growth.
If wood beams are available with cross secstions having h=2b, what is the minimum value of b (to the nearest even mm) that satisfies the shear stress citerion?
Antiques ‘R' Us is a mature manufacturing firm. The company just paid a dividend of $11.70, but management expects to reduce the payout by 4.5 percent per year, indefinitely.
A Styrofoam box has a surface area of 0.88 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, and the outside temperature is 27°C. If it takes 7.4 h for 5.0 kg of ice to melt in the container, determine the t
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