Increase the power of a test
When sample data actually occur in pairs, an advantage of a paired t-test is that it tends to increase the power of a test (as compared to treating each sample independently).
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Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.10 cm-3 and their speed is about 490 km/s. (a) Find the current density of these protons. A/m2 (b) If Earth's magnetic field did not deflect the protons
A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds a predetermined value. Suppose that the material to be used in a fuse melts when the current density rises to 390 A/cm2. What di
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A pulley having a rotational inertia of 1.0x10^4 g/cm^2 and a radius of 10 cm is acted upon by a force applied tangentially at its rim that varies in time as F=0.50t + 0.3t^2, where F is in Newton's and t is in seconds. If the pulley was initially
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John is listening to a horn. He knows the frequency of the horn is 516.402 Hz when both he and the horn are at rest. If John hears the horn's pitch at 549.402 Hz, which of the following are possible?
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