Qmt as
dCONFIDENTIAL
CS/JAN 2012/QMT420/STA470
UNIVERSITI TEKNOLOGI MARA FINAL EXAMINATION
COURSE COURSE CODE EXAMINATION TIME
STATISTICAL METHODS QMT420/STA470 JANUARY 2012 3 HOURS
INSTRUCTIONS TO CANDIDATES 1. 2. This question paper consists of twelve (12) questions. Answer ALL questions in the Answer Booklet. Start each question on a new page. Do not bring any material into the examination room unless permission is given by the invigilator. Please check to make sure that this examination pack consists of: i) ii) iii) the Question Paper an Answer Booklet - provided by the Faculty a Statistical Table - provided by the Faculty
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO
This examination paper consists of 6 printed pages
© Hak Cipta Universiti Teknologi MARA CONFIDENTIAL
CONFIDENTIAL QUESTION 1
2
CS/JAN 2012/QMT420/STA470
State whether the following statement is TRUE (T) or FALSE (F). a) A statistic is a measurement that explains a characteristic of a population. b) Inferential statistics refer to methods or techniques used to make conclusion of a population based on sample information such as tables, graph, the mean, median, mode and etc. c) A researcher will use the F distribution to make an inference on the ratio between two population variances. d) To construct a 90% confidence interval for u, if a small sample was selected randomly from normal population with unknown variance, the t distribution is used. e) The significance level a is the probability of rejecting the null hypothesis when it is false. f) Non-parametric test is used when the data are not normally distributed and the sample size is less than 30. (6 marks) QUESTION 2 Differentiate briefly the following terms: a) Point and interval estimates. b) Type I Error and Type II Error. (4 marks) QUESTION 3 The lifetimes of certain electronic components are approximately normally distributed with mean of 1500 hours and a standard deviation of 200 hours. 100 sample units are
CS/JAN 2012/QMT420/STA470
UNIVERSITI TEKNOLOGI MARA FINAL EXAMINATION
COURSE COURSE CODE EXAMINATION TIME
STATISTICAL METHODS QMT420/STA470 JANUARY 2012 3 HOURS
INSTRUCTIONS TO CANDIDATES 1. 2. This question paper consists of twelve (12) questions. Answer ALL questions in the Answer Booklet. Start each question on a new page. Do not bring any material into the examination room unless permission is given by the invigilator. Please check to make sure that this examination pack consists of: i) ii) iii) the Question Paper an Answer Booklet - provided by the Faculty a Statistical Table - provided by the Faculty
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO
This examination paper consists of 6 printed pages
© Hak Cipta Universiti Teknologi MARA CONFIDENTIAL
CONFIDENTIAL QUESTION 1
2
CS/JAN 2012/QMT420/STA470
State whether the following statement is TRUE (T) or FALSE (F). a) A statistic is a measurement that explains a characteristic of a population. b) Inferential statistics refer to methods or techniques used to make conclusion of a population based on sample information such as tables, graph, the mean, median, mode and etc. c) A researcher will use the F distribution to make an inference on the ratio between two population variances. d) To construct a 90% confidence interval for u, if a small sample was selected randomly from normal population with unknown variance, the t distribution is used. e) The significance level a is the probability of rejecting the null hypothesis when it is false. f) Non-parametric test is used when the data are not normally distributed and the sample size is less than 30. (6 marks) QUESTION 2 Differentiate briefly the following terms: a) Point and interval estimates. b) Type I Error and Type II Error. (4 marks) QUESTION 3 The lifetimes of certain electronic components are approximately normally distributed with mean of 1500 hours and a standard deviation of 200 hours. 100 sample units are