or each of the following questions, add a sheet to the dataset and work on the question in the corresponding sheet $($you can work on related questions in the same sheet$).$

We would like to know whether the houses close to the Charles River have generally high prices or not. Create three types of contingency tables $($percentage of overall totals, row totals, and column totals$)$ based on the CHAS and ISHIGHVAl variables and describe the results.