Question

1.35 pet names. 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 pets 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 names 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?
(c) what is the most common cat name?
(d) are cat names more common for cats than dogs?
(e) is the relationship between the two variables positive or negative? what does this mean in context of the data?

Explanation:

Step1: Identify data - collection type

The data is collected from an open - data portal about registered pets in a city. There is no manipulation of variables, so it is an observational study.

Step2: Find most common names

By observing the plot, we can see that for dogs, the name "Charlie" has a relatively high proportion. For cats, the name "Luna" has a relatively high proportion.

Step3: Compare cat and dog names

From the plot, we can see that names like "Max" and "Bella" are common for both cats and dogs, but overall, cat names and dog names do not seem to have a clear dominance in commonality.

Step4: Determine relationship

As we move along the x - axis (proportion of cats), the y - axis (proportion of dogs) values do not show a clear upward or downward trend. So, the relationship between the two variables is negative.

Answer:

(a) Observational study
(b) For dogs: Charlie; For cats: Luna
(c) No, cat names are not more common for dogs.
(d) Negative