Mosaic Plot

In this exercise you will learn to visualize the pairwise relationships between a set of quantitative variables. To this end, you will make your own note of 8.5 Mosaic plots from Data Visualization with R.

Mosaic charts can display the relationship between categorical variables using:

• rectangles whose areas represent the proportion of cases for any given combination of levels, and
• the color of the tiles to indicate the degree relationship among the variables.

The Titanic data set came from https://osf.io/aupb4/.

In the graph below,

• dark blue represents more cases than expected given independence (by chance); and
• dark red represents less cases than expected if independence holds (by chance).

Q1 Are more passengers survived?

No the majority of people died

Q2 Describe the largest group that didn’t survive. Discuss by class and gender.

The largest group that didnt survive were 3rd class males

Q3 Describe the largest group that did survive. Discuss by class and gender.

The largest group that survived were 1st class females

Q4 Describe one group that has more cases than expected given independence (by chance). Discuss by class and gender.

More 3rd class male passengers would have died if class didnt matter

Q5 Describe one group that has less cases than expected given independence (by chance). Discuss by class and gender.

Fewer 3rd class males survived than expected by chance, if gender and class didnt matter more 3rd class males should have survived.

Q6 Create a mosaic plot for Arthritis in the same way as above.

Hint: The Arthritis data set is from the vcd package. Add an additional argument gp = shading_max in the mosaic function. This is because the residuals are too small to have color.

Q7 Repeat Q1-Q5.

Q1- Majority did not show any signs of improvment Q2- The placebo group was the largest group that didnt show improvment Q3- The group that showed the most improvement was the treated group Q4- More people showed improvment that got treated than expected Q5- Less people showed improvment from the placebo group than expected

Q8 Hide the messages, the code and its results on the webpage.

Hint: Use message, echo and results in the chunk options. Refer to the RMarkdown Reference Guide.

Q9 Display the title and your name correctly at the top of the webpage.

Q10 Use the correct slug.