题目

Using data from twelve European countries, it has been calculated that the correlation between the level of car ownership and the number of road deaths is 0.73. Which of the statements shown follow from this?(i) High levels of car ownership cause high levels of road deaths(ii) There is a strong relationship between the level of car ownership and the number of road deaths(iii) 53% of the variation in the level of road deaths from one country to the next can be explained by the corresponding variation in the level of car ownership(iv) 73% of the variation in the level of road deaths from one country to the next can be explained by the corresponding variation in the level of car ownership

A

(i) and (ii) only

B

(i) and (iii) only

C

(ii) and (iii) only

D

(ii) and (iv) only

Chapter14Forecasting

(i) High levels of correlation do not prove that there is cause and effect. (ii) A correlation coefficient of 0.73 would generally be regarded as indicating a strong linear relationship between the variables. (iii) The coefficient of determination provides this information and is given by squaring the correlation coefficient, resulting in 53% in this case. (iv) The coefficient of determination provides this information and not the correlation coefficient. Remember that you must square the correlation coefficient in order to obtain the coefficient of determination.Statements (ii) and (iii) are relevant and the correct answer is therefore C.

多做几道

A company uses a standard absorption costing system. Last month budgeted production was 8,000 units and the standard fixed production overhead cost was $15 per unit. Actual production last month was 8,500 units and the actual fixed production overhead cost was $17 per unit.What was the total adverse fixed production overhead variance for last month?

A

$7,500

B

$16,000

C

$17,000

D

$24.500

A cost centre had an overhead absorption rate of $4.25 per machine hour, based on a budgeted activity level of 12,400 machine hours.In the period covered by the budget, actual machine hours worked were 2% more than the budgeted hours and the actual overhead expenditure incurred in the cost centre was $56,389.What was the total over or under absorption of overheads in the cost centre for the period?

A

$1,054 over absorbed

B

$2,635 under absorbed

C

$3,689 over absorbed

D

$3,689 under absorbed

Which of the following would help to explain a favourable direct labour efficiency variance?

(i) Employees were of a lower skill level than specified in the standard

(ii) Better quality material was easier to process

(iii) Suggestions for improved working methods were implemented during the period

A

(i), (ii) and (iii)

B

(i) and (ii) only

C

(ii) and (iii) only

D

(i) and(II) only

Which of the following statements is correct?

A

An adverse direct material cost variance will always be a combination of an adverse material price variance and an adverse material usage variance

B

An adverse direct material cost variance will always be a combination of an adverse material price variance and a favourable material usage variance

C

An adverse direct material cost variance can be a combination of a favourable material price variance and a favourable material usage variance

D

An adverse direct material cost variance can be a combination of a favourable material price variance and an adverse material usage variance

The following information relates to labour costs for the past month:

Budget                 Labour rate                      $10 per hour

                            Production time                15,000 hours

                           Time per unit                     3 hours

                           Production units                5,000 units 

Actual                Wages paid                       $176,000

                          Production                         5,500 units 

                        Total hours worked             14,000 hours

There was no idle time.

What were the labour rate and efficiency variances? 

A

Rate variance                 Efficiency variance

$26,000 Adverse           $25,000 Favourable

B

Rate variance                 Efficiency variance

 $26,000 Adverse           $10,000 Favourable

C

Rate variance                 Efficiency variance

 $36,000 Adverse           $2,500 Favourable

D

Rate variance                 Efficiency variance

 $36,000 Adverse           $25,000 Favourable

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