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Author Question: During lunch time, customers arrive at Bob's Drugs according to a Poisson distribution with = 4 per ... (Read 165 times)

Lobcity

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on: Jun 24, 2018
During lunch time, customers arrive at Bob's Drugs according to a Poisson distribution with  = 4 per minute.
 a. During a one-minute interval, determine the following probabilities: (1) no arrivals; (2) one arrival; (3) two arrivals; and, (4) three or more arrivals.
  b. What is the probability of two arrivals in a two-minute period?
  c. What is the probability that no more than 30 seconds elapses between arrivals?

Question 2

A regression model involved 5 independent variables and 136 observations. The critical value of t for testing the significance of each of the independent variable's coefficients will have
 a. 121 degrees of freedom
  b. 135 degrees of freedom
  c. 130 degrees of freedom
  d. 4 degrees of freedom


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lin77x

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Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .0183, .0733, .1465, .7619
b. .0107
c. .8647

Answer to Question 2

C


Lobcity

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Reply 2 on: Jun 24, 2018
Gracias!

Joy Chen

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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