Question

2. Two astronomers in different parts of the world make measurements M1 and M2 of the number of stars N in some small region of the sky, using their telescopes. Normally, there is a small probability e or error of up to one star in each direction. Each telescope can also be badly out of focus with probability f. Let F1 and F2 be boolean variables with Fi = True being that the i-th telescope is out of focus. If the telescope is out of focus then the scientist will always undercount by 3 or more stars (or, if N is 3 or less, fail to detect any stars at all). Which is the best network? 15 O Option 1 O Option 2 Q Option 3 Option 4

Answer 1

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