homework 8

# homework 8 - Statistics Prof. Giuseppe Arbia NYU - Spring...

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Statistics NYU - Spring 2012 Prof. Giuseppe Arbia V31.0018 – 001/ V31.0018 006 8 th homework Thursday March 22 nd 2012 Answer each of the questions. Read the questions carefully and keep your answers brief and to the point. PLEASE WRITE NEATLY. Please leave your homework in the mailbox of your respective Teaching Assistant by Tuesday at 8:00am. Since the homework will be discussed during the Lab sessions, no late homework can be accepted. Good work ! Question 1 Consider the experiment of drawing without replacement 5 balls from an urn that contains 7 balls numbered progressively from 1 to 7. The set of all possible 7 5 ! " # \$ % = 21 samples are reported here below. sample unit 1 unit 2 unit 3 unit 4 unit 5 1 1 2 3 4 5 2 1 2 3 4 6 3 1 2 3 4 7 4 1 2 3 5 6 5 1 2 3 5 7 6 1 2 3 6 7 7 1 2 4 5 6 8 1 2 4 5 7 9 1 2 4 6 7 10 1 3 4 5 6 11 1 3 4 5 7 12 1 3 4 6 7 13 1 3 5 6 7 14 1 4 5 6 7 15 1 2 5 6 7 16 2 3 4 5 6 17 2 3 4 5 7 18 2 3 4 6 7 19 2 3 5 6 7 20 2 4 5 6 7 21 3 4 5 6 7 a) Is the sampling criterion used a Simple Random Sample ? If yes explain why. If not explain why.

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## This note was uploaded on 04/05/2012 for the course STATS V3100018.0 taught by Professor Giuseppearbia during the Spring '12 term at NYU.

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homework 8 - Statistics Prof. Giuseppe Arbia NYU - Spring...

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