Quantitative Research Methods
sExam Quantitative Research Methods I, IB&M, 2011-2012
Friday, April 27th , 2012, 9:00-12:00 hours.
Name: Student number:
Each correctly answered multiple choice question yields 3 points. The remaining 55 points are alotted to the essay question.
The last question of this exam is on page 12.
Regarding the multiple choice questions: Use the scrap form. Please mark the box associated with the answer you deem to be correct. Do not forget to write your name on the scrap form and mark the right student number boxes. Regarding the open questions: Explain every single step in your reasoning. Answers without explanation never yield any points.
Good luck!
Multiple Choice Questions 1. Sixty percent of the pupils of some very large secondary school own a mobile phone. A group of 8 randomly chosen pupils of this school is asked whether they own a mobile phone. What is the probability that exactly 5 of them own a mobile phone? a. That probability is approximately 0.005. b. That probability is approximately 0.124. c. That probability is approximately 0.279. d. That probability is approximately 0.625. 2. The operation manager of a company that manufactures shirts wants to determine whether there are differences in the quality of workmanship among the three daily shifts. She randomly selects 600 recently made shirts and carefully inspects them. Each shirt is classified as either perfect or as flawed and the shift that produced the shirt is also recorded. In the test on the relation between quality and shift that the manager can now perform, what is the number of degrees of freedom of the test statistic? a. The number of degrees of freedom is 2. b. The number of degrees of freedom is 6. c. The number of degrees of freedom is 598. d. The number of degrees of freedom is 599. 3. A police officer believes that half of the cyclists ignore red traffic lights. To examine the issue, the police officer watches a busy crossroad with traffic lights from 8 AM till 10 AM. During these
Friday, April 27th , 2012, 9:00-12:00 hours.
Name: Student number:
Each correctly answered multiple choice question yields 3 points. The remaining 55 points are alotted to the essay question.
The last question of this exam is on page 12.
Regarding the multiple choice questions: Use the scrap form. Please mark the box associated with the answer you deem to be correct. Do not forget to write your name on the scrap form and mark the right student number boxes. Regarding the open questions: Explain every single step in your reasoning. Answers without explanation never yield any points.
Good luck!
Multiple Choice Questions 1. Sixty percent of the pupils of some very large secondary school own a mobile phone. A group of 8 randomly chosen pupils of this school is asked whether they own a mobile phone. What is the probability that exactly 5 of them own a mobile phone? a. That probability is approximately 0.005. b. That probability is approximately 0.124. c. That probability is approximately 0.279. d. That probability is approximately 0.625. 2. The operation manager of a company that manufactures shirts wants to determine whether there are differences in the quality of workmanship among the three daily shifts. She randomly selects 600 recently made shirts and carefully inspects them. Each shirt is classified as either perfect or as flawed and the shift that produced the shirt is also recorded. In the test on the relation between quality and shift that the manager can now perform, what is the number of degrees of freedom of the test statistic? a. The number of degrees of freedom is 2. b. The number of degrees of freedom is 6. c. The number of degrees of freedom is 598. d. The number of degrees of freedom is 599. 3. A police officer believes that half of the cyclists ignore red traffic lights. To examine the issue, the police officer watches a busy crossroad with traffic lights from 8 AM till 10 AM. During these