Question

Question 1:

The following information is obtained from a sample data set.

n = 20 ,   ∑​x = 130 ,   ∑​y = 960 ,   ∑​x y = 4908 ,   ∑​x 2 = 882

Find the estimated regression line.

  y ^ = Enter you answer to the field 1 in accordance to the question statement + ( Enter you answer to the field 2 in accordance to the question statement ) x

Question 2:

A sample data set produced the following information.

n = 15 , ∑ x = 100 , ∑ y = 340 ,   ∑ x y = 3470 ,   ∑ x 2 = 1260 ,   ∑ y 2 = 25774

Calculate the linear correlation coefficient r .

Round your answer to two decimal places.

r = Enter your answer in accordance to the question statement

Answer 1