Confidence interval for mean diameter of ball bearings
A random sample of 64 bearings produced by a machine has a mean diameter of 2.5 inches with a standard deviation of 0.1 inch. Construct a 90% confidence interval for the mean diameter of ball bearings.
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A skateboarder, starting from rest, rolls down a 12.0-m ramp. When she arrives at the bottom of the ramp her speed is 6.10 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.
A scientific committee of 4 persons is to be randomly selected from a group consisting of 3 biologists, 3 physicists and 4 mathematicians. Let X denote the number of biologists, Y the number of physicists and Z the number of mathematician on the
Assume that the charges made by all radio stations of the type sampled are approximately normally distributed. Construct the 95% confidence interval for the population mean.
A golf ball rolls off a horizontal cliff with an initial speed of 13.6 m/s. The ball falls a vertical distance of 12.0 m into a lake below. What is the speed v of the ball just before it strikes the water?
Calculate the equilibrium Keq for the tRNA binding to the protein and Calculate the delta G knot for the binding. Remember to use full molar units (not mM) for Keq in this calculation.
Suppose it is known that the time spent by customers in a fast-food restaurant is a normally distributed variable with a mean of 16 minutes and a standard deviation of 4 minutes. What is the probability that a random sample of 25 customers will yi
A cylindrical tank is 50 ft deep, 39.5 ft in diameter, and filled up to the top with water. A flashlight shines into the tank from above. What minimum angle can its beam make with the water surface if the beam is to illuminate part of the bottom?
What is the average force of the kinetic friction acting on the palace? what us tge palace's stopping distance?
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