Semester One Mid-semester Examinations, 2014 STAT1201 Analysis of Scientific Data THE UNIVERSITY OF QUEENSLAND AUSTRALIA LABORE AC Venue Seat Number Student Number Family Name This exam paper must not be removed from the venue First Name School of Mathematics & Physics EXAMINATION Semester One Mid-semester Examinations, 2014 STAT1201 Analysis of Scientific Data This paper is for St Lucia Campus and Gatton Campus students. Examination Duration: 60 minutes For Examiner Use Only Reading Time: 10 minutes Question Mark Exam Conditions: 1 This is a Closed Book Examination - specified materials permitted 2 During reading time - writing is not permitted at all Materials Permitted In The Exam Venue: 3 (No electronic aids are permitted e.g. laptops, phones) 4 Calculators - Casio FX82 series or UQ approved (labelled) 5 An annotated copy of A Portable Introduction to Data Analysis is permitted. Materials To Be Supplied To Students: 6 None Instructions To Students: This exam has 6 questions, each worth 8 marks. Total You should answer 5 out of the 6 questions for a maximum of 40 marks. Write your answers in the spaces provided in this examination paper. The backs of pages may be used for rough working but these will not be marked. The textbook can have any amount of annotations on the pages. Loose sheets of paper or post-it notes are not permitted. Unannotated plastic page tabs are allowed. This paper has 12 pages. Pages 11 and 12 give statistical tables. Page 1 of 12
Semester One Mid-semester Examinations, 2014 STAT1201 Analysis of Scientific Data Question 1 A group of 27 STAT1201 students each did a standing long jump, recording the horizontal distance they jumped along with their height and sex. a The figure below gives side-by-side box plots for jumping distance by sex. Compare the two distributions in terms of centre, spread and shape. [3 marks] 200 ? Distance (cm) 150 ? 100 Female Male b Give two brief explanations as to why there might be a difference in centre between the two distributions. [2 marks] Page 2 of 12
Semester One Mid-semester Examinations, 2014 STAT1201 Analysis of Scientific Data c The figure below shows a scatter plot of jumping distance against height for the 27 students. Describe the association between these two variables. [2 marks] ? ? ? ? 200 ? ? ? ? ? ? Distance (cm) ? ? 150 ? ? ? ? ? ? ? 100 ? ? ? 160 170 180 Height (cm) d Estimate the correlation coefficient, r, for the association between jumping distance and height. [1 mark] Page 3 of 12