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Correlation analysis-Inferential analysis

PART 2

b) A firm was interested to investigate the correlation between the number of product brochure distributed ('000 units) and its yearly sales revenue. The records for the past 10 years are examined and listed in the table below. Year Number of Product Brochure Distributed ('000 units) Sales (RM million) 2000 15 1.35 2001 18 1.63 2002 24 2.33 2003 22 2.41 2004 25 2.63 2005 29 2.93 2006 30 3.41 2007 32 3.26 2008 35 3.63 2009 38 4.15 Calculate the value of Pearson's product moment correlation coefficient. Interpret the value obtained. (7 marks) c) What is the difference between Spearman rank and Pearson's product moment correlation coefficients? (2 marks)