A stick is one foot long. You break it at a point X (measured from the left end) chosen randomly uniformly along its length. Then you break the left part at a point Y chosen randomly uniformly along its length. In other words, X is uniformly distributed between 0 and I and, given X =x, Y is uniformly distributed between 0 and x. a. Determine E(YLX = x) and then V(YLX = x). Is E(YLX = x) a linear function of x? b. Determine fr.y) using fy(x) and frx(ylr). c. Determine fr(y).

MATLAB: An Introduction with Applications
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A stick is one foot long. You break it at a point X
(measured from the left end) chosen randomly
uniformly along its length. Then you break the
left part at a point Y chosen randomly uniformly
along its length. In other words, X is uniformly
distributed between 0 and 1 and, given X =x, Y is
uniformly distributed between 0 and x.
a. Determine E(YLX = x) and then V(YIX = x). Is
E(YIX = x) a linear function of x?
b. Determine fAx.y) using fy(x) and fyx(ylr).
c. Determine fr(y).
d. Use fr(y) from (c) to get E(Y) and V(Y).
e. Use (a) and the theorem of this section to get
E(Y) and V(Y).
Transcribed Image Text:A stick is one foot long. You break it at a point X (measured from the left end) chosen randomly uniformly along its length. Then you break the left part at a point Y chosen randomly uniformly along its length. In other words, X is uniformly distributed between 0 and 1 and, given X =x, Y is uniformly distributed between 0 and x. a. Determine E(YLX = x) and then V(YIX = x). Is E(YIX = x) a linear function of x? b. Determine fAx.y) using fy(x) and fyx(ylr). c. Determine fr(y). d. Use fr(y) from (c) to get E(Y) and V(Y). e. Use (a) and the theorem of this section to get E(Y) and V(Y).
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