% MATLAB Tutorial - Nuclear Science and Engineering - Spring 2008 
% Instructor: Violeta Ivanova, violeta@mit.edu
% Faculty: Jacquelyn Yanch, jcyanch@mit.edu 

% EXERCISE 3 Linear Regression & Curve Fitting

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% A. LOAD DATA

% Load data from file worlddata.dat using Import Wizard or LOAD
% year: calendar year from 1950 to 2000
% N: world population
% Nbil: world population in billions






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% B. POLYNOMIAL FIT

% Fit a quadratic and plot the 95% confidence interval with POLYTOOL




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% C. CURVE FITTING TOOL

% Use the Curve Fitting Tool to fit different models of Nbil vs. year.
% Compare a quadratic fit to an exponential fit and a Gaussian fit. 
% Compute and compare three predictions for the world population in 2050.