Let Y1 <>Y2 <>Y3 <>Y4 be the order statistics of a random sample of size n = 4 from a continuous-type distribution with distribution function F{ x) and unknown 75th percentile eo.7.5·
(a) What is Pr ( Y3 :s;; eo.7s Y4)?
(b) What is the p.d.f. of V = F( Y4 ) - F( Y3)?