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rt A (Introduction): a) Write an introduction: • Explain the problem in general (e.g., vitamin D deficiency and recommended vitamin D level). Support your opinion with at least one reference (Harvard referencing), and Introduce all 5 variables: country (add frequency table), sun exposure (add frequency table), gender (add frequency table), age (add summary statistics vs. country, sun exposure and gender), and vitamin D level (add summary statistics vs. country, sun exposure and gender). Plot a histogram with a superimposed normal curve for both age and vitamin D level and describe your findings. Convert age to a categorical variable (call it NewAge) with 2 levels (<40 = "1", ≥ 40 "11") Create a side-by-side boxplot for vitamin D level vs. NewAge and a side- by-side boxplot for vitamin D level vs. country. Create a scatterplot to show the relationship between vitamin D level and Age. Compare these two side-by-side boxplots and the scatterplot and explain your findings. • Note: Write appropriate captions for the tables, graphs, and outputs.

rt A (Introduction): a) Write an introduction: • Explain the problem in general (e.g., vitamin D deficiency and recommended vitamin D level). Support your opinion with at least one reference (Harvard referencing), and Introduce all 5 variables: country (add frequency table), sun exposure (add frequency table), gender (add frequency table), age (add summary statistics vs. country, sun exposure and gender), and vitamin D level (add summary statistics vs. country, sun exposure and gender). Plot a histogram with a superimposed normal curve for both age and vitamin D level and describe your findings. Convert age to a categorical variable (call it NewAge) with 2 levels (<40 = "1", ≥ 40 "11") Create a side-by-side boxplot for vitamin D level vs. NewAge and a side- by-side boxplot for vitamin D level vs. country. Create a scatterplot to show the relationship between vitamin D level and Age. Compare these two side-by-side boxplots and the scatterplot and explain your findings. • Note: Write appropriate captions for the tables, graphs, and outputs.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Part A (Introduction): a) Write an introduction: • Explain the problem in general (e.g., vitamin D deficiency and recommended vitamin D level). Support your opinion with at least one reference (Harvard referencing), and Introduce all 5 variables: country (add frequency table), sun exposure (add frequency table), gender (add frequency table), age (add summary statistics vs. country, sun exposure and gender), and vitamin D level (add summary statistics vs. country, sun exposure and gender). Plot a histogram with a superimposed normal curve for both age and vitamin D level and describe your findings. Convert age to a categorical variable (call it NewAge) with 2 levels (<40= "1", ≥ 40 "11") Create a side-by-side boxplot for vitamin D level vs. NewAge and a side- by-side boxplot for vitamin D level vs. country. Create a scatterplot to show the relationship between vitamin D level and Age. Compare these two side-by-side boxplots and the scatterplot and explain your findings. • Note: Write appropriate captions for the tables, graphs, and outputs.
Transcribed Image Text:Part A (Introduction): a) Write an introduction: • Explain the problem in general (e.g., vitamin D deficiency and recommended vitamin D level). Support your opinion with at least one reference (Harvard referencing), and Introduce all 5 variables: country (add frequency table), sun exposure (add frequency table), gender (add frequency table), age (add summary statistics vs. country, sun exposure and gender), and vitamin D level (add summary statistics vs. country, sun exposure and gender). Plot a histogram with a superimposed normal curve for both age and vitamin D level and describe your findings. Convert age to a categorical variable (call it NewAge) with 2 levels (<40= "1", ≥ 40 "11") Create a side-by-side boxplot for vitamin D level vs. NewAge and a side- by-side boxplot for vitamin D level vs. country. Create a scatterplot to show the relationship between vitamin D level and Age. Compare these two side-by-side boxplots and the scatterplot and explain your findings. • Note: Write appropriate captions for the tables, graphs, and outputs.
Country ABBB ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ Other Other Other Male Male Male Male Male Female Female Female Female Female Other Other Other Other Other Other Male Male Male Male Mela Male Female Female Female Female Female Other Other Other Other Other Male Male Male Male Sun Exposure Low Low Low Low Low Low Low Low Low Low Low Low Low Low Low Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate High High High High High High High High High High High High Low Low Low Low Low Moderate Moderate Moderate Moderate Med Moderate Moderate Moderate Moderate Moderate www. Moderate Moderate Moderate Moderate Moderate Moderato Moderate High High High High High High High High High ******* High High High High High High 37 36 50 32 37 32 46 46 41 49 35 51 49 47 46 41 47 49 43 48 47 49 45 49 45 6 Age Vitamin D level
Transcribed Image Text:Country ABBB ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ ♡ Other Other Other Male Male Male Male Male Female Female Female Female Female Other Other Other Other Other Other Male Male Male Male Mela Male Female Female Female Female Female Other Other Other Other Other Male Male Male Male Sun Exposure Low Low Low Low Low Low Low Low Low Low Low Low Low Low Low Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate Moderate High High High High High High High High High High High High Low Low Low Low Low Moderate Moderate Moderate Moderate Med Moderate Moderate Moderate Moderate Moderate www. Moderate Moderate Moderate Moderate Moderate Moderato Moderate High High High High High High High High High ******* High High High High High High 37 36 50 32 37 32 46 46 41 49 35 51 49 47 46 41 47 49 43 48 47 49 45 49 45 6 Age Vitamin D level
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Part B (Methodology): In your methodology section, introduce the following three analyses with assumptions and models. The response variable for all models will be vitamin D level. • • • Factorial ANOVA - two factors: "Sun_Exposure", "Gender" Blocking (randomised design) - two fixed factors: "Sun_Exposure", "Gender" and one random factor: "Country" ANCOVA - two factors: "Sun_Exposure", "Gender" and continuous variable: "Age". Based on your findings in Part A, explain why we expect to get similar results for these factorial ANOVA and ANCOVA tests.
Transcribed Image Text:Part B (Methodology): In your methodology section, introduce the following three analyses with assumptions and models. The response variable for all models will be vitamin D level. • • • Factorial ANOVA - two factors: "Sun_Exposure", "Gender" Blocking (randomised design) - two fixed factors: "Sun_Exposure", "Gender" and one random factor: "Country" ANCOVA - two factors: "Sun_Exposure", "Gender" and continuous variable: "Age". Based on your findings in Part A, explain why we expect to get similar results for these factorial ANOVA and ANCOVA tests.
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