401077 : Introduction to Biostatistics Assignment

   

Added on  2021-04-21

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401077 Introduction to Biostatistics, Autumn 2018Assignment 1 Due Sunday April 1, 2018
401077 : Introduction to Biostatistics Assignment_1
Question 1 (5 marks) Consider the University of Eastern Sydney data set assigned to you.a.Explain why course of study (course) is a categorical variable. (1 mark) SolutionCourse is a categorical variable since it takes on values that are names of the differentcourses.b.Explain why mental well-being score (WEMWBS) is a numeric variable. (1 mark) SolutionMental-well-being score is numeric since it takes on numbersc.Using the University of Eastern Sydney data set assigned to you and R Commander,produce a boxplot of the relationship between course of study (course) and mentalwell-being score (WEMWBS). Your chart should include descriptive axis labels. (1mark) Solution
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d.Does the chart in c. show any evidence that mental well-being (WEMWBS) scorediffers according to course of study? Explain why or why not. (2 mark) SolutionYes the above plot shows that the mental well-being score varies based on the course.For instance, those taking Science or Engineering seem to have higher scores ascompared those taking other courses. Those taking Arts or Social Science seem tohave lower scores than anybody else. Question 2 (5 marks) a.Using the University of Eastern Sydney data set assigned to you and R Commander,tabulate the relationship between gender (sex) and the course of study (course). Yourtable should include descriptive labels. (1 mark)Solution Sex Course male female scienceeng 43 9 artssocsci 15 32 lawbus 43 38 medhealth 60 33b.Using row or column percentages describe the relationship between gender and course ofstudy. (2 marks)Solution sex course male female scienceeng 0.26708075 0.08035714 artssocsci 0.09316770 0.28571429 lawbus 0.26708075 0.33928571 medhealth 0.37267081 0.29464286As can be seen, only 8.04% of female students take science or Engineering coursescompared to 26.71% of the male students who take science or Engineering courses. A
401077 : Introduction to Biostatistics Assignment_3

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