The city of Seattle, WA has an open data portal that includes pets registered in the city. For each registered pet, we have information on the pet's name and species. The following visualization plots the proportion of dogs with a given name versus the proportion of cats with the same name. The 20 most common cat and dog names are displayed. The diagonal line on the plot is the x = y line; if a name appeared on this line, the name's popularity would be exactly the same for dogs and cats.

(a) Are these data collected as part of an experiment or an observational study?

(b) What is the most common dog name? What is the most common cat name?

(c) What names are more common for cats than dogs?

(d) Is the relationship between the two variables positive or negative? What does this mean in context of the data?

Transcribed Image Text:

Proportion of dogs 0.010- 0.008- 0.006 Daisy Lola Stella Molly 0.002- Buddy 0.004 Penny Maggie Chloe Milo Henry 0.002 Charlie Jack Max Bella Pepper Sophie 0.004 Lily Oliver Lucy Luna 0.006 Proportion of cats 0.008 0.010