the number of U.S. Citizens aged 65 year and older from 1900 through 2050 is estimated to be growing at the rate of  R(t) = 0.063t^2 - 0.48t + 3.87 ( 0 >=T < = 15 )  million people/decade, where t is measured in decades, with t = 0 corresponding to 1900. How many times faster will the average rate of growth of U.S. Citizens aged 65 yr and older between 2000 and 2050 be than theat between 1940 and 1990.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.