Marta runs a website, and she knows that almost all visitors arrive to her site from a web search, from social media, or directly by entering the website's address. She made a change to the website, and she wonders if it impacted the ways people navigate to the site. She took a random sample of 500 visits before she made the change, and a separate random sample of 500 visits after she made the change.
What type of statical test used in this case?
A. A χ2 goodness of fit test
B. A χ2 test for homogeneity
C. A homogeneity
D. A χ2 test of independence
E. A t-test for slope
