1 The third quartile, denoted by Q 3, is the median of the upper half of the data set. 2  This means that about 75% of the numbers in the data set lie below Q 3 and about 25% lie above Q 3.
The Visa Waiver Program is a program that enables citizens of 35 participating countries to travel to the United States for stays of 90 days or less without a visa.t is not required to update your new travel details in ESTA, it is optional. ESTA approval is valid for two years from the date of issue. If you have lost your application number you are still eligible to enter the US.
Passport Validity. The maximum period of time that a visitor may stay in Mexico without a formal visa is six months. Therefore your passport, regardless of country of origin, should be valid for a minimum period of six months, however long you intend to stay to avoid any potential problems at the port of entry.