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Author Question: A population has a mean of 180 and a standard deviation of 24 . A sample of 64 observations will be ... (Read 178 times)

naturalchemist

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on: Jun 24, 2018
A population has a mean of 180 and a standard deviation of 24 . A sample of 64 observations will be taken. The probability that the mean from that sample will be between 183 and 186 is _____.
 a. 0.1359
  b. 0.8185
  c. 0.3413
  d. 0.4772

Question 2

The number of customers at Winkies Donuts between 8:00 A.M. and 9:00 A.M. is believed to follow a Poisson distribution with a mean of 2 customers per minute.
 a. During a randomly selected one-minute interval during this time frame, what is the probability of 6 customers arriving to Winkies?
  b. What is the probability at least 2 minutes elapse between customer arrivals?


aprice35067

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

a

Answer to Question 2

a. .0120
b. .0183


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