Tuesday
March 31, 2015

Homework Help: Statistics

Posted by ruth on Thursday, August 10, 2006 at 2:04am.

Suppose X1;X2;...;X5 is a random sample from a n(0; variance) distribution. define

U = X1+X2+X3+X4;
V = (X2)^2+(X3)^2+(X4)^2+(X5)^2
and W = U/sqrtV.

(a) Name the distribution of U/4 and V/(variance) and give the values of their parameters.
(b) (i) Compute k such that kW has a t-distribution.
(ii) Give the number of degrees of freedom of this t-distribution.
(c) Compute E(V).

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

statistics - Suppose we take a random sample of size n from a normal population ...
Statistics - Suppose that the probability distribution of a random variable x ...
Probability - Let T1,T2,,Tn be i.i.d. observations, each drawn from a common ...
Statistics - Suppose that the probability distribution of a random variable x ...
Statistics - Which of these statements is not true about the variance in a ...
stat - Which of the following statements is true about the t-distribution with k...
Statistics - Assume a population of any 4 numbers(suppose: 4,8,15,19). Select a ...
Statistics - If the population is normally distribution then the sample must be ...
Statistics and Probability - Suppose you took 1000 random samples of size 200 ...
Statistics and Probability - Suppose you took 1000 random samples of size 200 ...

Members