Refer to Exercise 1.38.
In exercise
The Recording Industry Association of America provides data on the best-selling albums of all time. As of January, 2008, the top six best-selling albums of all time (U.S. sales only), are by the artists the Eagles (E), Michael Jackson (M), Pink Floyd (P), Led Zeppelin (L), AC/DC (A), and Billy Joel (B).
a. List the 15 possible samples (without replacement) of four artists that can be selected from the six.
b. Describe a procedure for taking a simple random sample of four artists from the six.
c. If a simple random sampling procedure is used to obtain four artists, what are the chances of selecting E, A, L, and B? P, B, M, and A?

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