Question: 1.12. Let {Xj , 1 < j < n} be independent r.v.'s each having the dJ. <1>. Find the chJ. of n 20: X] j

1.12. Let {Xj , 1 < j < n} be independent r.v.'s each having the dJ. <1>.

Find the chJ. of n 20: X]

j 1 and show that the conesponding p.d. is 2-n/2P(n/2)-lx(n/2l-1e-x/2 in (0, (0).

This is called in statistics the "X2 distribution with n degrees of freedom".

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