Consider the Epanechnikov kernel given by (k(t)=frac{3}{4}(1-t)^{2} delta{t ;[-1,1]}). Prove that (sigma_{k} R(k)=3 /(5 sqrt{5})).
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Consider the Epanechnikov kernel given by \(k(t)=\frac{3}{4}(1-t)^{2} \delta\{t ;[-1,1]\}\). Prove that \(\sigma_{k} R(k)=3 /(5 \sqrt{5})\).
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