A student survey was done to study the relationship between class standing (freshman, sophomore, junior, senior) and the amount of credit card debt...

A student survey was done to study the relationship between class standing (freshman, sophomore, junior, senior) and the amount of credit card debt ($0-$2000, $2001-$5000, $5000+).

a. What statistical test to use?b. What conditions/assumptions need to be verified to properly interpret the results?

c. What are the correct null and alternative hypothesis.  This includes the correct notation (including the correct Greek letters).