MAST90007 - Statistics for Research Workers - Statistics Assignment Help

Assignment Task

This question focuses on baseline characteristics and data.

(a) Briefly describe the design of the study to provide context for the analyses you report.

(b) Produce a summary table to describe the following characteristics of the study participants: age at baseline, height at baseline, weight at baseline and sex.

(c) Consider systolic and diastolic blood pressure at baseline. Produce suitable visual display(s) to allow a comparison of the distributions of these according to whether or not an individual was a smoker at baseline. You can exclude those with missing information about smoking from visual displays using Data Options > Group options.

(d) Carry out appropriate analyses to compare those who were smokers at baseline with those who were not, for systolic and diastolic blood pressure. Provide one or more suitable tables that includes the summary statistics and inferential statistics. (e) Discuss and justify any assumptions underlying your choice of analysis.

(f) Write a summary of the analyses you have carried out explaining the results of all the comparisons you have made. Write the summary for a doctor interested in the practical application of the study results.

(g) Consider predicting systolic blood pressure at baseline from age and Metropolitan relative weight at baseline. Provide graphical display(s) to illustrate the distributions of the explanatory variables. Explain if you would recommend rescaling these variables for this analysis. If appropriate, rescale the variables. Fit the model and obtain the parameter estimates for each of the explanatory variables. Explain the meaning of the parameter estimates for each of these explanatory variables, according to whether you have recommended rescaling or not. (You do not need to report other details of the analysis.)

(h) A colleague is also working with the same data file, and says: “This is great! The sample size is so big, everything is really, really significant; this whole study gives so many meaningful findings.” Respond to this comment.

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