The variance of a constant is zero. Adding a constant value, c, to a random variable does not change the variance, because the expectation (mean) increases by the same amount. Multiplying a random variable by a constant increases the variance by the square of the constant.
Panama City is a city and the county seat of Bay County, Florida, United States. Located along U.S. Route 98, it is the largest city between Tallahassee and Pensacola.
North America; when speaking more specifically, the country of Panama is located in Central America. It is a country close to South America and is south of Mexico and its neig â¦ hboring countries below it. 1 person found this useful.