If a random variable X follows a standard normal model N(0, 1), find the
density of X^2
For two independent standard normal random variables X and Y, find
the density of X^2+Y^2
For three independent standard normal random variables X, Y and Z,
find the density of X^2+Y^2+Z^2
If a random variable X follows a normal N(μ,σ^2), and a random variable
Y follows a χ2 (Chi-Square) model with degree of freedom k, assume that X and Y are
independent,
4.1) Use X and Y to construct a t-statistic;
4.2) Derive the density of the t-model that you construct in 4.1).
.PLEASE WRITE IT OUT NEATLY.
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