homework 4-006

# homework 4-006 - Statistics Prof Giuseppe Arbia 4th...

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Statistics NYU - Spring 2012 Prof. Giuseppe Arbia V31.0018 - 006 4 th homework Thursday February, 16 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 8:00 am. Since the homework will be discussed during the Lab sessions, no late homework can be accepted. Good work ! Question 1 In 6 families living in Manhattan we have observed the monthly income (X) and the monthly savings (Y) (K\$). The results are collected in the following table. Family 1 2 3 4 5 6 X 10 3 2 4.5 2 3 Y 4 0.5 1 1.5 0.4 1 a) derive the parameters of the linear regression that explains the monthly savings (Y) as a function of the monthly income (X) according to the LS (Least Squares) criterion. b) calculate what is the value of the savings that corresponds to a family with a monthly income of 6K\$ according to the regression;

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homework 4-006 - Statistics Prof Giuseppe Arbia 4th...

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