Abigail surveys students in different grades, and asks each student which pet they prefer. The responses are in the following table. What is the marginal frequency of each type of pet?

[list=1] [*]Sum the responses of people with each characteristic for the first pet type, “bird.” [*]Sum the responses of people with each characteristic for the first pet type, “cat.” [*]Sum the responses of people with each characteristic for the first pet type, “dog.” [*]Sum the responses of people with each characteristic for the first pet type, “fish.” [*]Organize the marginal frequencies in a two-way frequency table. [/list] This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url="http://www.walch.com"]www.walch.com[/url] for more information on their resources.