Question

1.)

Based on the data shown below, calculate the regression line (each value to two decimal places)

ˆyy^ =  +  xx

x	y
2	7.2
3	5.85
4	9.5
5	7.35
6	7.9
7	8.85
8	8.2

2.)

Annual high temperatures in a certain location have been tracked for several years. Let XX represent the year and YY the high temperature. Based on the data shown below, calculate the correlation coefficient (to three decimal places) between XX and YY. Use your calculator!

x	y
4	6.4
5	6.05
6	8.3
7	8.15
8	7.2
9	5.75
10	8.9
11	7.95
12	7.1

r=

Answer 1

Q.1) Using Excel we get, regression equation is,

y^ = 6.51 + 0.26x

Q.2) Using Excel we get, correlation coefficient is,

r = 0.305