Bighorn sheep are beautiful wild animals found throughout the western United States.
Data for this problem are based on information taken from The Desert Bighorn, edited by
Monson and Sumner. Let x be the age of a bighorn sheep (in years), and let y be the
mortality rate (percentage to die) for his age group. For example, x=1, y=14, means the
14% of the bighorn sheep between 1 and 2 years old die. A random sample of Arizona
bighorn sheep gave the following information:
a-Draw a scatter diagram for the data
b. Find x-bar, y-bar, b, and the equations of the least squares line. Plot the on scatter
diagram in part (a).
c. Find the sample correlation coefficient r and the coefficient of determination,
.
What percentage of variation in y is explained by the least-squares model?