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Author Question: Three messenger services deliver to a small town in Oregon. Service A has 60 of all the scheduled ... (Read 29 times)

a0266361136

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on: Aug 1, 2018
Three messenger services deliver to a small town in Oregon. Service A has 60 of all the scheduled deliveries, service B has 30, and service C has the remaining 10. Their on-time rates are 80, 60, and 40 respectively. Define event O as a service delivers a package on time. If a package was delivered 40 minutes late, what is the probability that it was service C?

Question 2

Consider an infinite population with a mean of 100 and a standard deviation of 20 . A random sample of size 64 is taken from this population. The standard deviation of the sample mean equals 2.50.
  Indicate whether the statement is true or false


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ebenov

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Reply #1 on: Aug 1, 2018
Answer to Question 1

P(COc) = P(C and Oc) / P(Oc) = (0.10)(0.60) / 0.30 = 0.20

Answer to Question 2

T


a0266361136

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Reply 2 on: Aug 1, 2018
Great answer, keep it coming :)

nguyenhoanhat

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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