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?

more passengers did not survive

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

3rd class male is the largest group that did not survive

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

1st class females were the group that had the largest amount of people that survived. they had positive persons and the largest grouping.

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

The group that has more cases then expected givin independance is 3rd class males that did not survive.

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

The group that has less cases then expected given independance is 3rd class males that did survive.

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= more people did not see improvement because of the hight of the box Q2= the largest group is placebo with no improvemnt because of the height of the box Q3= the largest group that saw no results are placebo that had no improvement Q4= the group that had more cases expected given independance was marked improvement that was treated Q5= the group with the least cases expected given independance was marked improvement that were placebo treatment.

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.