homework 3-006

# homework 3-006 - Statistics Prof Giuseppe Arbia NYU Spring...

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Statistics NYU - Spring 2012 Prof. Giuseppe Arbia V31.0018 - 006 3rd d homework Thursday February, 9 th 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 What is the variance of three consecutive integer numbers ? Question 2 The following table reports the total percentages of a set of individuals on which we observe the color of the eyes and the color of the hair. Blonde Brown Total Blue 0.58 0.16 0.74 Black 0.18 0.08 0.26 Total 0.76 0.24 1.00 a) What represents the frequency 0.08 b) And the frequency 0.76? Question 3 The following table reports a crosstabulation of the absolute frequencies of a set of 170 individuals on which we observe the quantitative variables X and Y X Y 1

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homework 3-006 - Statistics Prof Giuseppe Arbia NYU Spring...

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