A t-test is any statistical hypothesis test in which the test statistic follows a Student's t-distribution if the null hypothesis is supported.
Currently, 1 USD = 68.08 INR . So, 500 USD = 34032.18 INR. This value may vary due to the following causes : 1. Global economic slowdown: This the major factor which is contributing to both the stock markets and Indian currency fall.
As on today (22 May 2016) 1 US dollar equals Rs. 67.42. It will give the exact estimate in US dollars. Rupees to dollar or dollar to rupees conversion is entirely based on foreign exchange rates. Check this out : Dollars to Indian Rupees (USD vs INR) Currency Converter.