The regression equation Y = 3 + 2X has been calculated from 6 pairs of values, with X ranging from 1 to 10. The correlation coefficient is 0.8. It is estimated that Y = 43 when X = 20. Which of the following are true?
(i) The estimate is not reliable because X is outside the range of the data
(ii) The estimate is not reliable because the correlation is low
(iii) The estimate is reliable
(iv) The estimate is not reliable because the sample is small
When X _ 20, we don't know anything about the relationship between X and Y since the sample data only goes up to X _ 10. (i) is therefore true.Since a correlation coefficient of 0.8 would be regarded as strong (it is a high value) the estimate would be reliable. (ii) is therefore not true.
多做几道
Which of the following statements about management accounting information is/are true?
(i) They must be stated in purely monetary terms.
(ii) Limited companies must, by law, prepare management accounts.
(iii) They serve as a future planning tool and are not used as an historical record.
Which of the following statements is/are correct?
(i) A management control system is a term used to describe the hardware and software used to drive a database system which produces information outputs that are easily assimilated by management.
(ii) An objective is a course of action that an organisation might pursue in order to achieve its strategy.
(iii) Information is data that has been processed into a form meaningful to the recipient.
Good information should have certain qualities. Which of the following are qualities of good information?(i) Complete(ii) Extensive(iii) Relevant(iv) Accurate
Monthly variance reports are an example of which one of the following types of management information?
Which of the following statements is/are correct?
(i) Information for decision-making should incorporate uncertainty in some way
(ii) The data used to prepare financial accounts and management accounts are the
最新试题
该科目易错题
该题目相似题
