If the average arrival rate increases to 14, what is the ...

[altibaby]

If the average arrival rate increases to 14, what is the probability that the system is empty?
 
  A) 0.034
  B) 0.34
  C) 0.057
  D) 0.57

Question 2

What is quota sampling? States its advantages and disadvantages.
 
  What will be an ideal response?

[macybarnes]

Answer to Question 1

A

Answer to Question 2

Quota sampling is a nonprobabilistic sampling method, commonly used by polling organizations. Interviewers are assigned to a particular locale and instructed to contact specified numbers of people of certain age, race, and gender characteristics. These assigned quotas represent what are thought to be appropriate proportions for the population at large. However, once the quotas are determined, interviewers are granted flexibility in the choice of sample members. Their choice is typically not random. Quota sampling can, and often does, produce quite accurate estimates of population parameters. The drawback is that, since the sample is not chosen using probabilistic methods, there is no valid way of determining the reliability of the resulting estimates.

[altibaby]

Correct answers!

[macybarnes]

Great! Please up vote