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A large discount store gives its sales personnel bonuses based on their average sale amount. Since each salesperson makes hundreds of sales each month, the store management decided to base average sale amount for each salesperson on a random sample of the person's sales. Since records of sales are kept in books, the use of systematic sampling is convenient. Suppose a salesperson has made 855 sales over the month, and management wants to choose a sample of 30 sales for estimation of the average amount of all sales. Suggest a way of doing this so that no problems would result due to the fact that 855 is not an integer multiple of 30. Give the first element you choose to select, and explain how the rest of the sample is obtained.
A cell of emf 3.0 volts and internal resistance of 0.01 Ω is connected through an ammeter of 0.05 Ω internal resistances to a 5.0W rheostat by wire having a total resistance of 0.85 Ω. find what percentage error would be made by neglecting all resi..
A 6.00 kg mass is located at (2.00m, 2.00m, 2.00m) and a 5.00 kg mass is located at (-1.00m, 3.00m, -2.00 m). find the moment of inertia of this system
A certain medical machine emits x-rays with a minimum wavelength of 0.02 nm. One day, the machine has an electrical problem, What is the maximum x-ray energy this machine (with electrical problems) can produce
a mass of 0.40 kg hanging from a spring with a spring constant of 80.0 nm is set into an up-and-down simple harmonic
Starting from rest,a 10 cm diameter compact disk takes 3.0 s to reach its operating angular velocity of 2200 rpm. assume that the angular acceleration is constant.
The uniform 3.6 m pole is hinged to the truck bed and released from the vertical position as the truck starts from rest with an acceleration of 0.9m/s^2. If the acceleration remains constant during the motion of the pole, calculate the angular vel..
Illustrate what are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.
You're riding a Ferris wheel while sitting on a scale. A Ferris wheel with radius 9.6m has period 34s. The scale reading for a 80kg person at the BOTTOM of the Ferris wheel, assuming a constant rotation rate, is F = 810N. Find the scale reading for a..
Jill of the Jungle swings on a vine 6.9 meter long. Obtain what is the tension in the vine if Jill, whose mass is 63 kilogram, is moving at 2.4 m/s when the vine is vertical
How can a nuclear reactor contain many critical masses and not go supercritical? What methods are used to control the fission in the reactor?
Concave Shaving Mirror A concave shaving mirror has a radius of curvature of 35.0 cm. It is positioned so that the (upright) image of a man's face is2.00 times the size of the face. How far is the mirror from the face? Point Source A point source of ..
what is the magnetic field between the rails. A lead ball is dropped into a lake from a diving board 6 above the water. After entering the water, it sinks to bottom with a constant velocity equal to the velocity with which it hit the water. The bal..
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