Graham Hampton
09/26/2024 · Primary School
24) If \( z_{1} \) and \( z_{2} \) are two independent S.N.Vs then name the distribution of \( \left(z_{1}^{2}-z_{2}^{2}\right) \) and write its mean.
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The distribution of \( z_{1}^{2} - z_{2}^{2} \) is the difference of two independent chi-square distributions with 1 degree of freedom each. The mean of this distribution is 0.
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