Which of the following are components of a time series *ysis? (i) Trend(ii) Seasonal variation(iii) Cyclical variation

1 .The following statements relate to the calculation of the regression line y = a + bx using the information on the formulae sheet at the end of this examination paper:(i) n represents the number of pairs of data items used(ii) (Σx)2 is calculated by multiplying Σx by Σx(iii) Σxy is calculated by multiplying Σx by ΣyWhich statements are correct?

A (i) and (ii) only B (i) and (iii) only C (ii) and (iii) only D (i), (ii) and (iii)

题型: 单选题 提问时间: 2021-08-22

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2 .The correlation coefficient (r) for measuring the connection between two variables (x and y) has been calculated as 0.6.How much of the variation in the dependent variable (y) is explained by the variation in the independent variable (x)?

A 36% B 40% C 60% D 64%

题型: 单选题 提问时间: 2021-08-22

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3 .Which of the following is NOT a feasible value for the correlation coefficient?

A + 1.2 B + 0.6 C 0 D – 0.6

题型: 单选题 提问时间: 2021-08-22

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4 .Four years ago material X cost USD5 per kg and the price index most appropriate to the cost of material X stood at 150. The same index now stands at 430.What is the best estimate of the current cost of material x per kg?

A USD1.74 B USD9.33 C USD14.33 D USD21.50

题型: 单选题 提问时间: 2021-08-22

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5 .The following statements have been made about the use of linear regression analysis in cost estimation:(i) It provides more accurate estimates than the high low technique.(ii) It can only be used to estimate variable cost(iii) It assumes that cost behaviour is linear.(iv) It only takes into account two observations of cost and outputWhich of these statements are true?

A (i) and (ii) B (i) and (iii) C (ii) and (iii) D (iii) and (iv)

题型: 单选题 提问时间: 2021-08-22

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7 .Two years ago the price index appropriate to the cost of material X had a value of 120. It now has a value of 160.If material X costs USD2,000 per kg today, what would its cost per kg have been two years ago?

A USD1,500 B USD1,667 C USD2,667 D USD3,200

题型: 单选题 提问时间: 2021-08-22

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8 .A firm has used linear regression analysis to establish the relationship between total cost and activity in units.What does the slope of the regression line represent?

A the variable cost per unit B the fixed cost per unit C the average cost per unit D total variable costs

题型: 单选题 提问时间: 2021-08-22

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9 .Which of the following could be included in a time series based sales forecast? (1) Trend(2) Seasonal variation(3) Cyclical variation(4) Random fluctuation

A 1 only B 2 only C 1, 2 and 3 only D 1, 2, 3 and 4

题型: 单选题 提问时间: 2021-08-22

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10 .In a short-term decision-making context, which ONE of the following would be a relevant cash flow?

A Specific development costs already incurred. B The cost of special material which will be purchased. C Depreciation on existing fixed assets. D The original cost of raw materials currently in inventory which will be used on the project.

题型: 单选题 提问时间: 2021-08-22

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