(d) Compute the marginal pmf of X. 0 Px(x) Compute the marginal pmf of Y. y Py(y) 0 1 1 Using px(x), what is P(X < 1)? P(X ≤ 1) = [ 2 2 (e) Are X and Y independent rv's? Explain. OX and Y are not independent because P(x, y) = Px(x) · Py(y). OX and Y are independent because P(x, y) ‡ px(x) · py(y).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
Problem 64E
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(d) Compute the marginal pmf of X.
0
Px(x)
Compute the marginal pmf of Y.
y
Py(y)
1
1
Using px(x), what is P(X < 1)?
P(X ≤ 1) = [
2
2
(e) Are X and Y independent rv's? Explain.
OX and Y are not independent because P(x, y) = Px(x) · Py(y).
OX and Y are independent because P(x, y) ‡ px(x) · py(y).
OX and Y are independent because P(x, y) = Px(x) - Py(y).
OX and Y are not independent because P(x, y) # px(x) · py(y).
Transcribed Image Text:(d) Compute the marginal pmf of X. 0 Px(x) Compute the marginal pmf of Y. y Py(y) 1 1 Using px(x), what is P(X < 1)? P(X ≤ 1) = [ 2 2 (e) Are X and Y independent rv's? Explain. OX and Y are not independent because P(x, y) = Px(x) · Py(y). OX and Y are independent because P(x, y) ‡ px(x) · py(y). OX and Y are independent because P(x, y) = Px(x) - Py(y). OX and Y are not independent because P(x, y) # px(x) · py(y).
A service station has both self-service and full-service islands. On each island, there is a single regular unleaded pump with two hoses. Let X denote the number of hoses being used on the self-service island at a particular time, and let y denote the
number of hoses on the full-service island in use at that time. The joint pmf of X and Y appears in the accompanying tabulation.
p(x, y)
0
1
0 0.10 0.05 0.01
1
0.06 0.20 0.07
2 0.05 0.14 0.32
(a) What is P(X= 1 and Y= 1)?
P(X= 1 and Y= 1) = ||
(b) Compute P(X ≤ 1 and Y ≤ 1).
P(X ≤ 1 and Y ≤ 1) = |
2
(c) Give a word description of the event { X= 0 and Y ‡ 0}.
O One hose is in use on one island.
O At most one hose is in use at both islands.
O One hose is in use on both islands.
O At least one hose is in use at both islands.
Compute the probability of this event.
P(X0 and Y # 0) =
Transcribed Image Text:A service station has both self-service and full-service islands. On each island, there is a single regular unleaded pump with two hoses. Let X denote the number of hoses being used on the self-service island at a particular time, and let y denote the number of hoses on the full-service island in use at that time. The joint pmf of X and Y appears in the accompanying tabulation. p(x, y) 0 1 0 0.10 0.05 0.01 1 0.06 0.20 0.07 2 0.05 0.14 0.32 (a) What is P(X= 1 and Y= 1)? P(X= 1 and Y= 1) = || (b) Compute P(X ≤ 1 and Y ≤ 1). P(X ≤ 1 and Y ≤ 1) = | 2 (c) Give a word description of the event { X= 0 and Y ‡ 0}. O One hose is in use on one island. O At most one hose is in use at both islands. O One hose is in use on both islands. O At least one hose is in use at both islands. Compute the probability of this event. P(X0 and Y # 0) =
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