Let random variable X be uniformly distributed in interval [0,
T].
a) Find the nth moment of X about the origin.
b) Let Y be independent of X and also uniformly distributed in [0,
T]. Calculate the
second moment about the origin, and the variance of Z = X + Y
The weekly output of a steel mill is a uniformly
distributed random variable that lies between 110 and 175 metirc
tons. 1. Compute the probability that the steel mill will produce
more than 150 metric tons next week. 2. Determine the probability
that the steel mill will produce between 120 and 160 metric tons
next week.
5. A continuous random variable X is uniformly distributed over
(0,10). Compute the probability that an observed value of X will be
within one standard deviation of its mean.
Let X and Y be independent and uniformly distributed random
variables on [0, 1]. Find the cumulative distribution and
probability density function of Z = X + Y.
Let X and Y be uniformly distributed independent random
variables on [0, 1].
a) Compute the expected value E(XY ).
b) What is the probability density function fZ(z) of Z = XY
?
Hint: First compute the cumulative distribution function FZ(z) =
P(Z ≤ z) using a double integral, and then differentiate in z.
c) Use your answer to b) to compute E(Z). Compare it with your
answer to a).
Suppose that random variable X 0 = (X1, X2) is such that E[X 0 ]
= (µ1, µ2) and var[X] = σ11 σ12 σ12 σ22 . (a matrix)
(i) Let Y = a + bX1 + cX2. Obtain an expression for the mean and
variance of Y .
(ii) Let Y = a + BX where
a' = (a1, a2) B = b11 b12 0 b22 (a matrix).
Obtain an expression for the mean and variance of Y .
(ii)...
Suppose we have the following pdf for the random variable X
f(x) ={x 0<=x<=1
c/x^2 1<=x<= infinity
0 otherwise
}
(a) 2 points Find the value c such that f(x) is a valid pdf.
(b) 3 points Find the cdf of X.
(c) 1 point Find the 75th percentile of X.
Suppose voters are uniformly distributed along a continuum
between 0 and 1. There are two candidates. Voters will vote for the
candidate who locates closes to them. Candidates only care about
receiving more votes than the other candidate (and prefer a tie to
losing).What is the rationalizable set of locations for each
candidate?