The table data link is attached here: https://docs.google.com/spreadsheets/d/1QorJa5qWY1dyH7TzTvXhbHpolBNq4w_TwMJin91nCeA/edit?usp=sharing

With the data found in the google doc need to answer question 1,2,3

Use the data from the google doc link

1. Perform a statistical test to see whether the proportion of members who would recommend the Bank to their family and friends have increased because of the change.
2. Construct a 99% confidence interval for the difference of the proportions, before and after the change, of members who would recommend the Bank to their family and friends.
3. Use the data to perform a statistical test on whether a customer would recommend the Bank to their family and friends before the change is dependent on the gender of the customer.