Question 1

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Your assignment is to consider the following two scenarios and answer the associated questions. Submissions must adhere to the following: - Name the file as "your student number statsassignment" - The file must be in MS-Word format, or similar word processing software, not a PDF - Number all questions clearly, and make sure that tables and graphs are neatly formatted (including an appropriate header and caption, respectively) Question 1[20] As the head of an environmental consulting company, you wonder whether the species richness of macroinvertebrates is determined by the conductivity of the water in the Orange River. To test this, you sample 10 different stretches of the Orange River for macroinvertebrates and count the number of different species. You then measure the conductivity at each site. You obtain the following data: Using these data, complete the following tasks: a. Explain which are the dependent and independent variables [2] b. Describe which statistical analysis would be appropriate to analyse these data and why [2] c. Read the data into R and perform the appropriate statistical test [5] d. Report and explain the statistical outputs [4] e. Write a summary of the main conclusion in a way that is understandable to non-statisticians [2] f. Present the data in an informative figure [5] Your assignment is to consider the following two scenarios and answer the associated questions. Submissions must adhere to the following: - Name the file as "your student number statsassignment" - The file must be in MS-Word format, or similar word processing software, not a PDF - Number all questions clearly, and make sure that tables and graphs are neatly formatted (including an appropriate header and caption, respectively) Question 1[20] As the head of an environmental consulting company, you wonder whether the species richness of macroinvertebrates is determined by the conductivity of the water in the Orange River. To test this, you sample 10 different stretches of the Orange River for macroinvertebrates and count the number of different species. You then measure the conductivity at each site. You obtain the following data: Using these data, complete the following tasks: a. Explain which are the dependent and independent variables [2] b. Describe which statistical analysis would be appropriate to analyse these data and why [2] c. Read the data into R and perform the appropriate statistical test [5] d. Report and explain the statistical outputs [4] e. Write a summary of the main conclusion in a way that is understandable to non-statisticians [2] f. Present the data in an informative figure [5]