I want to calculate p-value of the % of customers using each product in each of the two countries to understand if the % difference in usage of a product in each country is really significant i.e people of one country prefer a product more as compared to other country. How can I write a TTEST_SIG formula to find the % of users of each product in each country and then compare the percentages of one country with other for each product? Below is the sample data:
