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According to the Bureau of Labor Statistics, the average hourly wage in the US was $22.57 in May 2010. A random sample of 36 hourly workers was selected during the month. The average wage for this sample was $21.32. Assume the standard deviation of wages for the country is $4.30.
a. Are the results of this sample consistent with the claim made by the Bureau of Labor Statistics using a 95% confidence interval?
b. What is the margin of error for this sample?
If the initial electric Force is, F, and the electron were moved to one third he original distance toward the proton, what would be the new electrical force
The spin cycles of a washing machine have two angular speeds, 431rev/min and 622rev/min . The internal diameter of the drum is 0.440m. Find the laundry's maximum tangential speed
You have a lens whose focal length is 12.7 cm. You place an object on the axis of the lens at a distance of 6.25 cm from it. How far is the object\'s image from the lens
A 2.5 mm diameter copper wire carries a current of 33 A, uniformly distributed across its cross-section. Determine the magnetic field at the surface of the wire
The Earth can be approximated as a sphere of uniform density, rotating on its axis once a day. What is the moment of inertia of the Earth
If i have a hollow copper sphere that has an outer diameter of 20.00 cm that is floating so that everything is just submerged in a bucket of water
two plates of radius R are separated by a distance 2h.the top plate rotates with velocity w. find the velocity as a function of radius r and and height z
A violin string 30.00 cm long and fixed at both ends oscillates in its n = 1 mode. The speed of waves on the string is 280 m/s, What is the wavelength of the emitted sound wave
An air-filled parallel-plate capacitor has plates of area 2.20 cm2 separated by 2.00 mm. What is the charge on the capacitor
Assuming that the bricks are lifted with constant speed, illustrate what is the minimum power the motor must produce?
A steel wire of length 1.97 with circular cross section must stretch no more than 0.260 when a tensile (stretching) force of 400 is applied to each end of the wire. What is the minimum diameter necessary.
Two circuits contain an emf produced by a moving metal rod, like that shown. The speed of the rod is the same in each circuit, other than the bulb in circuit 1 has one-half the resistance of the bulb in circuit 2.
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