Question: Data collected on credit card debt. The bank is concerned that while the overall level of indebtedness has increased along with inflation, household incomes have not been increasing to keep pace. Twelve months ago, the average monthly household income was $9350. Conduct a test at the 5% level of significance to see if average monthly household income has increased.

https://docs.google.com/spreadsheets/d/1bSZHbwPNGbCDYpzWtiGki6__EvdL3SwR/edit?usp=sharing&ouid=103554660041491209256&rtpof=true&sd=true