Thank you for using the site. Can you tell me more about the research question you are using for this project, and a little about the data that you have created/collected?
Ok, here's is what I would do with that research question:
1. Create two sets of mock data consisting of the profit margin values for the companies. One set would be for companies that do have a social media presence, and the other set would be companies that do not have a social media presence.
2. Phrase the hypotheses as: H0: p1 = p2, and H1: p1 > p2. The variable p1 is the average profit margin for companies with a social media presence, and p2 is the average profit margin for companies that do not.
3. Perform a two-sample test of proportions using the z-statistic.
Please let me know if you need more information.
The mock data?
Yes, I could do that. I'll have it posted for you as soon as I can get it typed up.
Here is the set of data that I used:
And here is the corresponding hypothesis test:
I misspoke earlier. Rather than being a test of proportions, this test should be a two-sample test of means.