Final answer:
The statistical analysis that can be performed is calculating the percentage of residents living below the poverty line in Gastown. In this case, the percentage is 15.6%.
Step-by-step explanation:
The statistical analysis that can be performed based on this data is the calculation of the percentage of residents living below the poverty line in Gastown. To do this, divide the number of people with an annual income below the poverty line (20) by the total sample size (128). Multiply the result by 100 to get the percentage. In this case, the percentage of residents living below the poverty line in Gastown is 15.6%.