Find two new correlations: for the original data plus Point A and for the original data plus Point B.
The recentage return is on the horizontal axis and the new birds are on the vertical axis.
Correlation coefficient for the original data including point A.
Find the sum of every column to get:
Use the following formula to work out the correlation coefficient.
Correlation coefficient for the data including point B.
The U.S. Census Bureau publishes information on the population of the United States in Current Population Reports. The following table gives the resident U.S. population, in millions of persons, for the years 1990-2009. Forecast the U.S. population in the years 2010 and 2011
a) Obtain a scatterplot for the data.
b) Find and interpret the regression equation.
c) Mace the specified forecasts.