Homework Sourse33Regardless of the value of Xi the associated population of
33.Regardless of the value of Xi, the associated population of Yi values is assumed to have:
a. the same variance
b. a variance that is proportional to the value of Xi
c. a variance of zero
d. a variance that is proportional to the value of Yi
e. none of the above
34.if the confidence interval for the slope of a simple regression model ranged from -.24 to +1.68, one would conclude that:
a. there is a linear relationship between x and y
b. there is a nonlinear relationship between x and y
c. there is no linear relationship between x and y
d. there is no linear relationship, but there is a nonlinear relationship between x and y
e. none of the above
35. the first step in a simple linear regression anaylsis is:
a. drawing a scatter diagram
b. point esimation
c. interval estimation
d. hypothesis testing
e. forecasting
Solution
35. the first step in a simple linear regression anaylsis is:
a. drawing a scatter diagram
First we need to plot the scatter diagram to find the relation between two variables
33.Regardless of the value of Xi, the associated population of Yi values is assumed to have:
a. the same variance
In testing we assume that both variances are equal
34)if the confidence interval for the slope of a simple regression model ranged from -.24 to +1.68, one would conclude that:
there is a nonlinear relationship between x and y
