5. Robins and blackbirds make independent visits to a bird feeder. Suppose that the times between visits by robins are given by independent Exponential(2) random variables R₁, R₂, ... and times between visits by blackbirds are given by independent Exponential(2) random variables B₁, B₂, ..., and that more- over these sequences are independent of each other. (a) Show that with probability R/(λR +2B) the first bird to arrive is a robin. Hint: The first bird arrives at time min{R₁, B₁}. (b) Given that n birds have arrived by time t, find and identify the condi- tional distribution for the number of robins that have arrived by time t. Hint: Use the Memoryless Property.
5. Robins and blackbirds make independent visits to a bird feeder. Suppose that the times between visits by robins are given by independent Exponential(2) random variables R₁, R₂, ... and times between visits by blackbirds are given by independent Exponential(2) random variables B₁, B₂, ..., and that more- over these sequences are independent of each other. (a) Show that with probability R/(λR +2B) the first bird to arrive is a robin. Hint: The first bird arrives at time min{R₁, B₁}. (b) Given that n birds have arrived by time t, find and identify the condi- tional distribution for the number of robins that have arrived by time t. Hint: Use the Memoryless Property.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 32E
Related questions
Question
5
![5. Robins and blackbirds make independent visits to a bird feeder. Suppose that
the times between visits by robins are given by independent Exponential(2)
random variables R₁, R₂, ... and times between visits by blackbirds are given
by independent Exponential(2) random variables B₁, B₂, ..., and that more-
over these sequences are independent of each other.
(a) Show that with probability R/(λR +2B) the first bird to arrive is a
robin. Hint: The first bird arrives at time min{R₁, B₁}.
(b) Given that n birds have arrived by time t, find and identify the condi-
tional distribution for the number of robins that have arrived by time t.
Hint: Use the Memoryless Property.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb390922a-c60e-4850-aaf9-af48aa8c4d48%2F779f7a94-8ad6-46da-bac8-e96738354939%2F7bbld5i_processed.png&w=3840&q=75)
Transcribed Image Text:5. Robins and blackbirds make independent visits to a bird feeder. Suppose that
the times between visits by robins are given by independent Exponential(2)
random variables R₁, R₂, ... and times between visits by blackbirds are given
by independent Exponential(2) random variables B₁, B₂, ..., and that more-
over these sequences are independent of each other.
(a) Show that with probability R/(λR +2B) the first bird to arrive is a
robin. Hint: The first bird arrives at time min{R₁, B₁}.
(b) Given that n birds have arrived by time t, find and identify the condi-
tional distribution for the number of robins that have arrived by time t.
Hint: Use the Memoryless Property.
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