Based on data from a dart-throwing experiment, the article “Shooting Darts” (Chance, Summer 1997, 16–19) proposed that the horizontal and vertical errors from aiming at a point target should be independent of one another, each with a normal distribution having mean 0 and variance σ2. It can then be shown that the pdf of the distance V from the target to the landing point is
a. This pdf is a member of what family introduced in this chapter?
b. If σ = 20mm (close to the value suggested in the paper), what is the probability that a dart will land within 25 mm (roughly 1 in.) of the target?
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