Question: quantitative studies Question 3: [25 marks] The following table shows the finished output and the expenditure on electricity for 6 months: Finished output (*000 units)

quantitative studies

Question 3: [25 marks] The following table shows the finished output and the expenditure on electricity for 6 months: Finished output (*000 units) Expenditure on electricity (RM'000) | 38 (a) Calculate the product moment correlation coefficient. Hence, interpret your answer. (7 marks) (b) Calculate the coefficient of determination and interpret your answer. (3 marks) () Rank the above data and calculate the Spearman's rank correlation coefficient. (6 marks) (d) Find the least squares regression line, = a + bX for the data above. (5 marks) (e) Estimate the expenditure on electricity for a month with 11,000 units of finished output. Comment on the reliability of your estimate. (4 marks)

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