(b) Determine the p.m.f. or p.d.f. of Y, whichever is appropriate. (c) Compute P{Y = 1/2}.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section: Chapter Questions
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4. Suppose Y has c.d.f. F(t) = t³ for 0 < t < 1.
(a) Compute F(3).
Transcribed Image Text:4. Suppose Y has c.d.f. F(t) = t³ for 0 < t < 1. (a) Compute F(3).
(b) Determine the p.m.f. or p.d.f. of Y, whichever is appropriate.
(c) Compute P{Y = 1/2}.
(d) Before computing the mean, graph the p.d.f.. Will the mean be between
0 and 1/2 or between 1/2 and 1?
(e) Compute E[Y].
(f) Compute E[Y²].
(g) Compute the variance of Y.
(h) Compute P{Y ≤ 1/4 | Y ≤ 1/2}.
(i) Compute P{Y ≤ t | Y ≤ 1/2}.
(j) Let I be the interval defined by {t € R[F(t) ≥ 1/27}. The interval I is
of the form I = [b, ∞) where b equals what?
Transcribed Image Text:(b) Determine the p.m.f. or p.d.f. of Y, whichever is appropriate. (c) Compute P{Y = 1/2}. (d) Before computing the mean, graph the p.d.f.. Will the mean be between 0 and 1/2 or between 1/2 and 1? (e) Compute E[Y]. (f) Compute E[Y²]. (g) Compute the variance of Y. (h) Compute P{Y ≤ 1/4 | Y ≤ 1/2}. (i) Compute P{Y ≤ t | Y ≤ 1/2}. (j) Let I be the interval defined by {t € R[F(t) ≥ 1/27}. The interval I is of the form I = [b, ∞) where b equals what?
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