Credit card debt for 10 people was compared before a major economic crash (perhaps one like that of 2008) and then after economic recovery, let's say 5 years later.Which of the following is an appropriate null hypothesis for this research?

Question

Quizplus · Accepted Answer

The null hypothesis states that there is no significant difference between credit card debt before the economic crash and after economic recovery, which makes choice D the most appropriate. Choice A cannot be the null hypothesis as economic recoveries can have an impact on debt carried by citizens. Choice B is not appropriate as it makes a claim about the difference in debt without a specified direction. Choice C is also not appropriate as it makes a claim about the general trend of credit card debt.

Credit Card Debt for 10 People Was Compared Before a Major