# Description of Linear Regression

1.) The linear regression model has a slope or -2.5 and an intercept of 10. The sample coefficient of determination is 0.50. What is the value of the sample correlation coefficient?

2.) What percentage of observations of a normal distribution are represented by the mean plus or minus 1.96 standard deviations?

#### Solution Summary

The solution provides a step by step method for the calculation of sample correlation coefficient from coefficient of determination.