Distribution of the sum of independent
The distribution of the sum of independent N(?, ?2) random variables is:
a. always approximately normal
b. always exactly normal
c. usually approximately normal
d. usually exactly normal e. sometimes approximately normal
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McDonalds Waiting Times. You want to estimate SD for the population of waiting times at McDonald's drive up windows. You want to be 95% confident that the sample SD is within 20% of SD. Find the minimum sample size. Is this sample size practical?
Find the maximum thermal efficiency of this heat engine (62.1%). Determine whether this engine can produce its desired power output (no).
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Write down the pdf for each of the following distributions, then sketch the distributions on the axes provided (be sure to indicate which is which). a) N(2,9), b) N(0,1)
A round casting is 0.1 m in diameter and .5 m in length. What is the difference in the solidification time of the two castings?
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The heat exchanger effectiveness is 75%. Use a heating value for kerosene of 45,840 kJ/kg. What is the engine specific fuel consumption?
Consider a harmonic oscialltor of mass m under a restoring force -kx and damping force -bx. It is displaced at +A and then released with zero velocity. Find the equation representing the underdamped, critically damped, and overdamped motions.
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Explain the risks of not reporting the results of your forensic assessment findings accurately. Provide specific examples.
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