Sally's restaurant was in business for only four days. The ...

[Haya94]

Sally's restaurant was in business for only four days. The numbers of customers on each of those days were: 7, 11, 9, 4
  Assume that samples of size 2 are randomly selected with replacement from this population of four values.
 
  Describe how you would go about finding the sampling distribution of means.

Question 2

A study conducted at a certain college shows that 71 of the school's graduates find a job in their chosen field within a year after graduation.
 
  Find the probability that 6 randomly selected graduates all find jobs in their chosen field within a year of graduating.
  A) 0.085 B) 4.260 C) 0.180 D) 0.128

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Answer to Question 1

List the 16 different possible samples of size 2 and find the mean of each one. Since each sample is equally likely, each sample has probability 1/16. The sampling distribution of the samples means consists of the 16 sample means paired with the probability of 1/16.

Answer to Question 2

D

[Haya94]

Thank you!

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Always glad to help...