Consider the following annual sales data for 2001-2008: Year Sales 2001 2 2002 4 2003 10 2004 8 2005 14 2006 18 2007 17 2008 20 Use the linear regression method and determine the estimated sales equation. Calculate the coefficient of determination. Calculate the correlation coefficient.

Consider the following annual sales data for 2001-2008: Year Sales 2001 2 2002 4 2003 10 2004 8 2005 14 2006 18 2007 17 2008 20 Use the linear regression method and determine the estimated sales equation. Calculate the coefficient of determination. Calculate the correlation coefficient.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 11PPS

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Question

B). Consider the following annual sales data for 2001-2008:

Year	Sales
2001	2
2002	4
2003	10
2004	8
2005	14
2006	18
2007	17
2008	20

Use the linear regression method and determine the estimated sales equation.
Calculate the coefficient of determination.
Calculate the correlation coefficient.

Definition Definition Statistical measure used to assess the strength and direction of relationships between two variables. Correlation coefficients range between -1 and 1. A coefficient value of 0 indicates that there is no relationship between the variables, whereas a -1 or 1 indicates that there is a perfect negative or positive correlation.

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