Text 1:
You are given the following information about variables y and x:
y
x
Dependent Variable
Independent Variable
-0.0
-7.2
8.2
3.7
-3.1
6.4
10.3
7.7
In addition, it is known that the slope of the regression line b1 = -2.6
The y-intercept b0 for the estimated regression equation equals ____ (round your answer to two decimal places).
Text 2:
Regression analysis was applied between sales data (in $1,000s) and advertising data (in $100s) and the following information was obtained:
y = 12 + 1.8x
n = 25
sb1 = 0.2683
Using α = 10%, the critical t value for testing the significance of the slope is ____
Show your answer with three decimal places.
Text 3:
As a result of running a simple regression on a data set, the following estimated regression equation was obtained:
y = 1.0 - 5.0x
Furthermore, it is known that SSR = 760, and SSE = 131.
Calculate the correlation coefficient R; round your answer to three decimal places.