IGCSE-Statistics 统计学03900390_s04_er.pdfVIP

0390 Mathematics: Statistics (Half Credit) June 2004 CONTENTS MATHEMATICS: STATISTICS (HALF CREDIT) 2 Paper 0390/06 Paper 6 2 1 0390 Mathematics: Statistics (Half Credit) June 2004 MATHEMATICS: STATISTICS (HALF CREDIT) Paper 0390/06 Paper 6 General comments This paper produced a wide range of marks. Many Centres however, entered candidates who had clearly not covered the syllabus and this was reflected in the performance of these candidates. Most candidates answered questions to a suitable degree of accuracy, and it was pleasing to observe that only a few lost marks due to premature approximation. Candidates seemed to have sufficient time to answer all the questions, and only the weaker ones answered questions out of order. Candidates from some Centres did not appear to know anything about the normal distribution. The use of clear diagrams in answering these questions would have helped many candidates to earn more marks, as many found the wrong area for the probability. Comments on specific questions Question 1 This question was well done by nearly everyone. There are still some Centres who do not teach candidates to use SD mode on their calculators, and so there were pages of working for the standard deviation when all that was required was a single number from their calculator. It is to be hoped that candidates realise that when only one mark is given, they are not expected to do pages of working. The second part was well answered, with many candidates having a good knowledge of the relationship between consistency and standard deviation. Answers : (i) 139, 83.1; (ii) team B, smaller standard deviation. Question 2 This question was a little unusual in that giving the data in the fo