# Final work

.doc
Introduction: A fictional cohort study and longitudinal Survey in Student Health and Wellbeing at ACU was conducted during the student's enrolment at first year and third year students (follow up data). Statistics are carefully observed and calculated to determine the following variables: a) Road traffic accidents b) Depression and obesity Dataset Analysis: 1. a. Mean is a sum of all observations divided by number of observations. Standard deviation is used to measure the dispersion of a data set from its mean. Descriptive Statistics N Minimum Maximum Mean Std. Deviation AGE 38681 16 59 20.50 4.888 Valid N (listwise) 38681 Fig. 1.a. Descriptive statistics based on age as continuous variables The above table depicts that the average age of student at ACU at first year during enrolment is 20.50 whereas the standard deviation value for student's age is 4.888. Similarly, the minimum and maximum age recorded for first year enrolment at ACU is 16 and 59 respectively. 1. b) Age_category Frequency Percent Valid .00 11879 30.7 1.00 11672 30.2 2.00 5494 14.2 3.00 3755 9.7 Total 32800 84.8 Missing System 5881 15.2 Total 38681 100.0 Fig. 1.b. Frequency and percentage of new age_category.
The above figure represents that most of the students who got enrolled at ACU were aged 18 which comprises of 30.7 % of entire enrolled students. In contrast, students with age 26 or above were the least number of students enrolled at ACU which includes 9.6 %. Likewise, 15.2 % of students were under 18 years which is categorised as missing system to avoid ethical issues. 2) Demographic variables Frequency Percentage Cohort (Years) 2005 3259 8.4 2006 3615 9.3 2007 3944 10.2 2008 4086 10.6 2009 5010 13.0 2010 5687 14.7 2011 6383 16.5 2012 6697 17.3 State NSW 15860 41.0 Victoria 13571 35.1 Queensland 7528 19.5 ACT 1722 4.5 Gender Male 10449 27.0 Female 28232 73.0 Living_Arrange At home 20840 53.9 College/student accom 6850 17.7 Independently 10991 28.4 Faculty Arts and Sciences 9004 23.3 Education 15038 38.9 Health Sciences 11729 30.3 Theology and Philosophy 588 1.5 Business 2322 6.0 Degree_type Single 34620 89.5 Double 4061 10.5 Metro Metro 27223 70.4 Non-metro 5015 13.0 Study_mode FT 34770 89.9 PT 3911 10.1 Fee_Status Domestic 32238 83.3 International 6443 16.7 Fig. 2. Descriptive statistics for demographic variables.
As shown in cohort frequency table, the total number of students at Australian Catholic University (ACU) in 2012 was 38,681. The lowest number of students at ACU was 3,259 in 2005 which indicates 8.4% of present students. There has been a dramatic increase in number of students since 2005. Every year increase in number of students is approximately by 10 % until 2008. Number of students were significantly raised in 2012 by 17.3 % and the frequency of students that year were 6,697. 3. Independent T-test was used to measure the mean for aggression, thrill seeking and risk acceptance. Demographic Variables p-value or significance Driver aggression Thrill seeking Risk acceptance Gender 0.934 0.710 0.116 Metropolitan 0.472 0.489 0.382 Study mode 0.757 0.895 0.024 RTA in past 12 months 0.000 0.000 0.000 Fig. 3. Significance values for demographic variables. Several demographic variables such as gender, metropolitan background status, study mode and RTA in past 12 months are studied to compare the mean for aggression, thrill seeking and risk acceptance. Levene's Test for Equality of Variances displayed insignificant values for gender (> 0.05). Therefore, the t-test for equality of Means variances were considered not equal and values from equal variance not assumed were used. Statistics shows that mean for aggression (p=0.934), thrill seeking (0.710) and risk acceptance (0.116) do not have significant difference between male and female. Hence, it indicates weak evidence against null hypothesis and accept the null hypothesis.