An assumption of regression analysis is homoscedasticity,which states that the
A) variation of the dependent variable is the same across all values for the independent variable.
B) residuals exhibit no patterns across values for the independent variable.
C) residuals exhibit no patterns across values for the dependent variable.
D) relationship between the independent and dependent variables is linear.
Question 2
Progressive Insurance would like to test the hypothesis that a difference exists in the proportion of students in 12th grade who text while driving when compared to the proportion of 11th grade drivers who text.
A random sample of 160 12th grade students found that 84 texted while driving. A random sample of 175 11th grade students found that 70 texted while driving. If Population 1 is defined as 12th grade drivers and Population 2 is defined as 11th grade drivers, the pooled estimate for the overall proportion is ________.A) 0.460
B) 0.506
C) 0.611
D) 0.780
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