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
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