Question: 5 5 AAMS1773 QUANTITATIVE STUDIES Question 3 a) The table below summarizes the years of experience and monthly sales of 8 marketing officers. Years of

5 5 AAMS1773 QUANTITATIVE STUDIES Question 3 a)

5 5 AAMS1773 QUANTITATIVE STUDIES Question 3 a) The table below summarizes the years of experience and monthly sales of 8 marketing officers. Years of experience, X Monthly sales (RM000), Y 3 4 98 2 81 9 110 6 102 12 136 11 10 118 100 97 (i) Calculate the product moment correlation coefficient. Interpret your results. (7 marks) Find the least squares regression line, = a +bX for the data above. (5 marks) (ii) (iii) Jacky has been working as a marketing officer for 14 years. Use your answer in part (ii) to estimate his monthly sales. Is the estimation reliable? Why? (3 marks) b) The table below shows the weight distribution of two different types of durian supplied by a local farm. A farmer of this farm claims that the weights are highly associated with the types of durian. Type Musang King D24 Below 5 130 60 Weight (kg) 5 to 8 330 170 Above 8 130 180 Conduct a relevant test to investigate if there is sufficient evidence to support the farmer's claim at 2% significance level. (10 marks) [Total: 25 marks]

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