What is the difference between (beta)1 and b1 ?
a. none; exactly the same; slope of regression line.
b. (beta)1 is the unknown population value, while b1 is its estimate from the data.
c. b1 is the unknown population value, while (beta)1 is its estimate from the data.
Answer: b. (beta)1 is the unknown population value, while b1 is its estimate from the data.