Mean and standard deviation of sampling distribution
A population has a mean of 81 and standard deviation of 25. Find the mean and standard deviation of sampling distribution of a sample means with sample size 262.
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A body weighs 6 grams when placed on one pan and 24 grams when placed on the other pan of a defective beam balance according to the reading shown on the instrument. If the beam is horizontal when both pans are empty, what is the true weight of the
Is the flow laminar or turbulent? Justify your answer. What is the total heat which can be dissipated if the plate temperature is not to exceed 80 °C.
A car is traveling on a straight road. The maximum velocity that can be attained by the car is 24 m/s. The maximum acceleration and decceleration it can attain is 1 m/s^2 and 4 m/s^2 respectively. Find the minimum time taken by the car to start fr
Again, consider the trials involved with flipping a fair coin. It is reasonable to assume that coin flips are "independent." What is the probability of observing two "heads" outcomes in two consecutive flips of a fair coin?
In a preliminary design for a mail-sorting machine, parcels moving at 2 ft/s slide down a smooth inclined ramp and a horizontal surface with kinetic coefficient of friction μk with the parcel.
For each of the cases below, involving areas under the standard normal curve, decide whether the first area is bigger, the second area is bigger, or both areas are equal.
Air enters an ideal diffuser operating at steady state at 1 bar, -3°C and 260 m/s and exits at with a velocity of 130 m/s. Determine : the exit temperature and pressure for the air.
Find the area under the standard normal curve which lies between z = 0.72 and z = 1.59
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