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In the situation of problem 17-6, how would you account for the prior knowledge that 8% of the population of those who receive a brochure actually buy?
Problem 17-6
A mail-order firm wants to be able to classify people as prospective buyers versus nonbuyers based on some of the people's demographics provided on mailing lists. Prior experience indicates that only 8% of those who receive a brochure end up buying from the company. Use two criteria to determine the minimum overall prediction success rate you would expect from a discriminant function in this case.
two parallel metal plates have area a 255 cm2 and are separated by l 0.50cm. they have a potential difference of 0.25
Three charges are located at the corners of an equilateral triangle with sides 20 cm. What is the electric field at the center of the triangle
A 3.4cm diameter parallel-plate capacitor has a 2.5mm spacing. The electric field strength inside the capacitor is 1.5×10^5 V/m, how much is the charge on each plate
It is desired to construct a solenoid that will have a resistance of 5.60 (at 20°C) and produce a magnetic field of 4.00 multiplied by 10-2 T at its center when it carries a current of 3.60 A. calculate the length the solenoid should have
A 82 kg diver steps off a 13 m tower and drops from rest straight down intothe water. If he comes to rest 4.5 mbeneath the surface, determine the average resistance force exertedon him by the water.
A small oven has a surface area of 0.26 m2. The insulated walls are 1.3 cm thick with an average thermal conductivity of 0.040 W/moC. What is the rate of heat loss
A muon is created by a cosmic ray high in Earth's atmosphere. It travels towards Earth at a speed v = 0.93c for a distance of 4.7km as gauged by an observer at rest with respect to Earth. The muon is unstable, and decays (self-destructs) into 3 other..
How to generate a constant deceleration
The low range of frequencies used for medical applications is about 1,000,000 Hz. What is the wavelength of this frequency in air
two equal point charges each of magnitude 2.00 x 10-6 c are located on the x axis one at x 1.00m the other at x
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). What is the distance between the first-order red and blue fringes
A 370-g block is dropped onto a vertical spring with spring constant k=3.2 N/cm. While the spring is being compressed, what work is done by the block's weight
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